Error securing application with users\roles - asp.net-mvc-3

Question

Trying to use security features and create Forms Authentication in my MVC3 application I Used Project-ASP.Net Configuration which opened ASP.Net Web Site Administration Tool.
I went to Security-Roles Management, added a role and tried to manage users attached to it. When try to check a box to attach user
http://i.stack.imgur.com/WJV74.png
I've got an error.
An error was encountered. Please return to the previous page and try again.
The following message may help in diagnosing the problem: The user 'user' was not found. at System.Web.Administration.WebAdminPage.CallWebAdminHelperMethod(Boolean isMembership, String methodName, Object[] parameters, Type[] paramTypes) at ASP.security_roles_managesinglerole_aspx.EnabledChanged(Object sender, EventArgs e) at System.Web.UI.WebControls.CheckBox.OnCheckedChanged(EventArgs e) at System.Web.UI.WebControls.CheckBox.RaisePostDataChangedEvent() at System.Web.UI.WebControls.CheckBox.System.Web.UI.IPostBackDataHandler.RaisePostDataChangedEvent() at System.Web.UI.Page.RaiseChangedEvents() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
May be it is smth wrong in Web.config?
<?xml version="1.0"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=152368
-->
<configuration>
<connectionStrings>
<add name="MusicStoreDB"
providerName="System.Data.SqlClient"
connectionString="Data Source=my-pc;Initial Catalog=MusicStoreDB;User Id=usr;Password=1;" />
<add name="SecDB"
providerName="System.Data.SqlClient"
connectionString="Data Source=my-pc;Initial Catalog=SecDB;User Id=usr;Password=1;" />
</connectionStrings>
<appSettings>
<add key="webpages:Version" value="1.0.0.0"/>
<add key="ClientValidationEnabled" value="true"/>
<add key="UnobtrusiveJavaScriptEnabled" value="true"/>
</appSettings>
<system.web>
<authorization>
<allow roles="adm" />
<allow roles="adm" />
</authorization>
<globalization culture="en-US" />
<compilation debug="true" targetFramework="4.0">
<assemblies>
<add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.WebPages, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</assemblies>
</compilation>
<authentication mode="Forms">
<forms loginUrl="~/Account/LogOn" timeout="2880" />
</authentication>
<membership>
<providers>
<clear/>
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="SecDB"
enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false"
maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10"
applicationName="/" />
</providers>
</membership>
<profile>
<providers>
<clear/>
<add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="SecDB" applicationName="/" />
</providers>
</profile>
<roleManager enabled="true" defaultProvider="DefaultRoleProvider">
<providers>
<add connectionStringName="SecDB" applicationName="/" name="DefaultRoleProvider"
type="System.Web.Providers.DefaultRoleProvider" />
</providers>
</roleManager>
<pages>
<namespaces>
<add namespace="System.Web.Helpers" />
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Routing" />
<add namespace="System.Web.WebPages"/>
</namespaces>
</pages>
</system.web>
<system.webServer>
<validation validateIntegratedModeConfiguration="false"/>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="3.0.0.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
</configuration>
help please

Answer 1

FIXED.
must use
<roleManager enabled="true" defaultProvider="AspNetSqlRoleProvider">
<providers>
<remove name="AspNetSqlRoleProvider"/>
<add connectionStringName="SecureDB" applicationName="/" name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" />
</providers>
</roleManager>
Thanks!