MSTest.exe not copying all needed project DLLs?

I'm trying to get MSTest.exe to run, and it seems like testcontainer isn't being read properly; while my tests all run successfully in all config environments within Visual Studio.

the command I'm using is:

"C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\MSTest.exe" /nologo /usestderr /testSettings:"C:\temp\MyProject\Sources\MyProject\Local.testsettings" /searchpathroot:"C:\temp\MyProject\Binaries" /resultsfileroot:"C:\temp\MyProject\TestResults" /testcontainer:"C:\temp\MyProject\Binaries\MyProject.Services.Server.UnitTests.dll" 

The project references within testcontainer project look like this:

<ItemGroup>
    <ProjectReference Include="..\..\Services\MyProject.Services.Server\MyProject.Services.Server.csproj">
        <Project>{92EC1999-CC0C-47DD-A4D6-17C3B1233C50}</Project>
        <Name>MyProject.Services.Server</Name>
    </ProjectReference>
    <ProjectReference Include="..\..\SvcConfiguration\MyProject.ServiceConfiguration.Interfaces\MyProject.ServiceConfiguration.Interfaces.csproj">
        <Project>{8E2E7BA9-75DB-458E-A184-AC1030EAD581}</Project>
        <Name>MyProject.ServiceConfiguration.Interfaces</Name>
    </ProjectReference>
    <ProjectReference Include="..\..\SvcConfiguration\MyProject.ServiceConfiguration.Services\MyProject.ServiceConfiguration.Services.csproj">
        <Project>{39514766-23A8-45DB-96EA-B6B4D9C8B086}</Project>
        <Name>MyProject.ServiceConfiguration.Services</Name>
    </ProjectReference>
</ItemGroup>

Neither the ServiceConfiguration.Interfaces nor the ServiceConfiguration.Services DLL is placed into the Out folder in TestResults.

The project GUIDs do match between the references and the referenced projects.

Is there something that I'm missing in the command line?