Works for us, WF4.0-M080 seems to work better then M040.
In Reply to Vinay Marje:
PTC support site mentions following.
Microsoft Visual C++ .NET 2005 SP1
Note: Supported for Microsoft Windows 32-bit platform.
Not supported for Microsoft Windows 64-bit platform in DLL mode.
Does this still hold true? Has anyone had success with .NET 2005 SP1 on