TypeMock & NCover on BuildServer doesn't work

I'm using CC.NET on Windwos 2003 Server, together with MsBuild, NUnit, TypeMock and NCover.

After installing the new NCover 2.0.1 all projects that uses NCover are broken showing the message: "TypeMock.TypeMockException : *** TypeMock.NET is not enabled, to enable do one of the following: ...."

I always had problems running NCover and TypeMock together, but somehow after reading all the hints releated to that subject I could fix the it. (Sorry, but I could never reproduce what fixed the problem at the end). However I could never make it work using the example from the TypeMock-Documentation (<TypeMockStart> and <TypeMockStop>). Following snippet shows how I call NCover and TypeMock. It worked with NCover 1.5.8 but now it causes the problem mentioned above:

<Target Name="RunTestsWithTypeMock" DependsOnTargets="MakeDirectories;Build;CreateNUnitCmdLineArgs">
<Exec Command="&quot;$(TypeMockRunnerTool)&quot; -first -link NCover &quot;$(NCoverToolPath) cover.console.exe&quot; //a &quot;@(CoverageAssemblies->'%(Identity)',';')&quot; //x &quot;$(NCoverResultFile)&quot; &quot;$(NUnitToolPath) unit-console.exe&quot; $(NUnitCmdLineArgs)"
Condition="'$(CoverageAnalysisEnabled)'=='true'"></Exec>
</Target>

-Is there a problem with that?
-Why would it work with NCover 1.5.8 but with NCover 2.0.1 not?
-Could Linking/Unlinking in the TypeMockConfiguration influence anything? If yes, should I unlink NCover if using the snippet above?

Thanks for any ideas
JJ