Maven - issue running mvn help:effective-pom - maven

Question

I am working through a basic Maven tutorial, and managed to create a simple archetype and run a mvn install. However, when trying to do a mvn help:effective-pom, I just seem to get this output:
mvn help:effective-pom [INFO] Scanning for projects... [INFO]
[INFO]
------------------------------------------------------------------------ [INFO] Building simple 1.0-SNAPSHOT [INFO]
------------------------------------------------------------------------ [INFO] [INFO] --- maven-help-plugin:2.2:effective-pom (default-cli) #
simple --- Downloading:
http://repo1.maven.org/maven2/org/apache/maven/maven-plugin-parameter-documenter/2.2.1/maven-plugin-parameter-documenter-2.2.1.pom
Downloading:
http://repo1.maven.org/maven2/org/apache/maven/maven-plugin-parameter-documenter/2.2.1/maven-plugin-parameter-documenter-2.2.1.pom
[INFO]
------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO]
------------------------------------------------------------------------ [INFO] Total time: 0.925s [INFO] Finished at: Mon May 13 21:41:09 BST
2013 [INFO] Final Memory: 9M/131M [INFO]
------------------------------------------------------------------------ [ERROR] Failed to execute goal
org.apache.maven.plugins:maven-help-plugin:2.2:effective-pom
(default-cli) on project simple: Execution default-cli of goal
org.apache.maven.plugins:maven-help-plugin:2.2:effective-pom failed:
Plugin org.apache.maven.plugins:maven-help-plugin:2.2 or one of its
dependencies could not be resolved: Failed to collect dependencies for
org.apache.maven.plugins:maven-help-plugin:jar:2.2 (): Failed to read
artifact descriptor for
org.apache.maven:maven-plugin-parameter-documenter:jar:2.2.1: Could
not transfer artifact
org.apache.maven:maven-plugin-parameter-documenter:pom:2.2.1 from/to
central (http://repo1.maven.org/maven2): Access denied to:
http://repo1.maven.org/maven2/org/apache/maven/maven-plugin-parameter-documenter/2.2.1/maven-plugin-parameter-documenter-2.2.1.pom
-> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using
the -X switch to enable full debug logging. [ERROR] [ERROR] For more
information about the errors and possible solutions, please read the
following articles: [ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException
not much hope for me if I cant get past "Hello World" example...any advice appreciated.
Regards
i

Answer 1

One of your network components blocks access to http://repo1.maven.org/maven2/org/apache/maven/maven-plugin-parameter-documenter/2.2.1/maven-plugin-parameter-documenter-2.2.1.pom, that's all.