VS.NET action does not use DEVENV

[sw.slave]

I need to compile managed C# code using VS.NET 2002 and unmanaged C++ code using both VS.NET 2002 and 2003. I have tried setting the DEVSTUDIO_NET_DIR macro to the required respective locations, but the command line used does not use the modified path. I even tried setting DEVENV directly but to no avail.