My problem is quite simple, I have a CI server which runs msbuild and mstest.
The problem is that the Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll<
@Ruben Bartelink : You can get mstest.exe in your machine by installing test agents. you can find it @given location. Post installation, invoke mstest.exe with /testcontainer and /test options. It runs successfully and creates trx files. Check for something which can process trx and generate reports.
http://www.microsoft.com/en-us/download/details.aspx?id=38186