Maven permission denied - maven

Question

I'm getting strange exception while trying to create exploded war directory with maven. And it's strange because I already changed all files permissions to 777 for everyone.
What should I check? Ican't find any useful info in stacktrace :(
Goals I execute:
install war:exploded tomcat:redeploy
Here's stacktrace:
Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.3:exploded (default-cli) on project app-web: Failed to copy file for artifact [com.kk:app-core2:jar:app-SNAPSHOT:compile]: D:\kk\app-2013\app-core2\target\classes (Odmowa dostępu) -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.3:exploded (default-cli) on project app-web: Failed to copy file for artifact [com.kk:app-core2:jar:app-SNAPSHOT:compile]
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: Failed to copy file for artifact [com.kk:app-core2:jar:app-SNAPSHOT:compile]
at org.apache.maven.plugin.war.packaging.ArtifactsPackagingTask.performPackaging(ArtifactsPackagingTask.java:137)
at org.apache.maven.plugin.war.packaging.WarProjectPackagingTask.handleArtifacts(WarProjectPackagingTask.java:195)
at org.apache.maven.plugin.war.packaging.WarProjectPackagingTask.performPackaging(WarProjectPackagingTask.java:107)
at org.apache.maven.plugin.war.AbstractWarMojo.buildWebapp(AbstractWarMojo.java:479)
at org.apache.maven.plugin.war.AbstractWarMojo.buildExplodedWebapp(AbstractWarMojo.java:412)
at org.apache.maven.plugin.war.WarExplodedMojo.execute(WarExplodedMojo.java:43)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 19 more
Caused by: java.io.FileNotFoundException: D:\kk\app-2013\app-core2\target\classes (Odmowa dostępu)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.(FileInputStream.java:138)
at org.codehaus.plexus.util.FileUtils.doCopyFile(FileUtils.java:1067)
at org.codehaus.plexus.util.FileUtils.copyFile(FileUtils.java:1049)
at org.apache.maven.plugin.war.packaging.AbstractWarPackagingTask.copyFile(AbstractWarPackagingTask.java:304)
at org.apache.maven.plugin.war.packaging.AbstractWarPackagingTask$1.registered(AbstractWarPackagingTask.java:152)
at org.apache.maven.plugin.war.util.WebappStructure.registerFile(WebappStructure.java:211)
at org.apache.maven.plugin.war.packaging.AbstractWarPackagingTask.copyFile(AbstractWarPackagingTask.java:147)
at org.apache.maven.plugin.war.packaging.ArtifactsPackagingTask.performPackaging(ArtifactsPackagingTask.java:112)
... 26 more
EDIT POM.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<parent>
<artifactId>app</artifactId>
<groupId>com.kk</groupId>
<version>2013-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>app-web</artifactId>
<packaging>war</packaging>
<name>Application</name>
<dependencies>
<!- whole lot of dependecies->
</dependencies>
<build>
<resources>
<resource>
<filtering>false</filtering>
<directory>src/main/resources</directory>
<includes>
<include>**</include>
</includes>
<excludes>
</excludes>
</resource>
<resource>
<filtering>false</filtering>
<directory>src/main/java</directory>
<includes>
<include>**</include>
</includes>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
<resource>
<filtering>false</filtering>
<directory>src/main/html</directory>
<includes>
<include>**</include>
</includes>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.0</version>
</plugin>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<configuration>
<downloadSources>true</downloadSources>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<configuration>
<excludeResources>true</excludeResources>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
<configuration>
<source>1.6</source>
<target>1.6</target>
<encoding>UTF-8</encoding>
<complianceLevel>1.6</complianceLevel>
<includes>
<include>**/IMediaManager.java</include>
<include>**/CachableMediaManager.java</include>
<include>**/BaseApplication.java</include>
</includes>
<aspectLibraries>
<aspectLibrary>
<groupId>com.kk</groupId>
<artifactId>commons-cache</artifactId>
</aspectLibrary>
</aspectLibraries>
</configuration>
<dependencies>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjtools</artifactId>
<version>${aspectj.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
<finalName>app-web</finalName>
</build>
<profiles>
<profile>
<id>development</id>
<dependencies>
<dependency>
<groupId>com.kk</groupId>
<artifactId>app-web-config</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<properties>
<m2eclipse.wtp.contextRoot>/</m2eclipse.wtp.contextRoot>
</properties>
</profile>
</profiles>
</project>