The property “sonar.cs.fxcop.assembly” must be set and the project must have been built

We are using SonarQube 5.0 and MSBuild Sonar Runner 1.01 C# plugin 4.2, jdk 1.8,

While running the analysis with FxCop Rules enabled we Caused by: The property "sonar.cs.fxcop.assembly" must be set and the project must have been built to execute FxCop rules. This property can be automatically set by the Analysis Bootstrapper for Visual Studio Projects plugin, see: http://docs.codehaus.org/x/TAA1Dg. If you wish to skip the analysis of not built projects, set the property "sonar.visualstudio.skipIfNotBuilt".

I have installed fxcop 10.0.we are Using in windows server 2008 R2, we are not using any database,My major concern is if I deactivate all my fxcop rules then my sonar works.But if I activate then I get the above error, so tell me what should I do after installing FXcop? I mean to tell what are the extra configuration need to be done If I want my sonar to run with fxcop. Kindly revert me back with your suggestion