Hi,
    I am getting following error::
    Could not load file or assembly 'System.Web.Security.SingleSignOn,  Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of  its dependencies. The system cannot find the file specified.
    I am using following code in web.config file::
    <?xml version="1.0"?>
  <configuration>
  <configSections>
  <sectionGroup name="system.web">
  <section name="websso"  type="System.Web.Security.SingleSignOn.WebSsoConfigurationHandler,  System.Web.Security.SingleSignOn, Version=1.0.0.0, Culture=neutral,  PublicKeyToken=31bf3856ad364e35, Custom=null"/>
  </sectionGroup>
  </configSections>
  <system.web>
  <sessionState mode="Off"/>
  <compilation defaultLanguage="c#" debug="true"  targetFramework="4.0">
  <assemblies>
  <add assembly="System.Web.Security.SingleSignOn, Version=1.0.0.0,  Culture=neutral, PublicKeyToken=31bf3856ad364e35, Custom=null"/>
  <add assembly="System.Web.Security.SingleSignOn.ClaimTransforms,  Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, Custom=null"/>
  <add assembly="System.Web.Mvc, Version=2.0.0.0, Culture=neutral,  PublicKeyToken=31BF3856AD364E35"/></assemblies>
  </compilation>
  <customErrors mode="Off"/>
  <authentication mode="None"/>
  <httpModules>
  <add name="Identity Federation Services Application Authentication  Module"  type="System.Web.Security.SingleSignOn.WebSsoAuthenticationModule,  System.Web.Security.SingleSignOn, Version=1.0.0.0, Culture=neutral,  PublicKeyToken=31bf3856ad364e35, Custom=null"/>
  </httpModules>
  <websso>
  <authenticationrequired/>
  <eventloglevel>55</eventloglevel>
  <auditsuccess>2</auditsuccess>
  <urls>
  <returnurl>https://adfsweb.treyresearch.net/claimapp/</returnurl>
  </urls>
  <cookies writecookies="true">
  <path>/claimapp</path>
  <lifetime>240</lifetime>
  </cookies>
  <fs>https://adfsresource.treyresearch.net/adfs/fs/federationserverservice.asmx</fs>
  </websso>
  <pages controlRenderingCompatibilityVersion="3.5"  clientIDMode="AutoID"/></system.web>
  <system.diagnostics>
  <switches>
  <add name="WebSsoDebugLevel" value="0"/>
  <!-- Change to 255 to enable full debug logging -->
  </switches>
  <trace autoflush="true" indentsize="3">
  <listeners>
  <add name="LSLogListener"  type="System.Web.Security.SingleSignOn.BoundedSizeLogFileTraceListener,  System.Web.Security.SingleSignOn, Version=1.0.0.0, Culture=neutral,  PublicKeyToken=31bf3856ad364e35, Custom=null"  initializeData="d:\logdir\claimapp.log"/>
  </listeners>
  </trace>
  </system.diagnostics>
  </configuration>
     I have installed MVC3 setup but still it is showing that errror.  Please help me
    Thanks in advance