On my client I opened VS 2005 and in my options changed my Source Control provider from SS 2005 to SOS 4.2. I then exited VS 2005 and restarted it.
From within Visual Studio I select Open - Source Control - Open From Source Control and attempt to open an setup project (vdproj).
The Visual Studio client locks up, and if I look at the Source Off Site service running on my server, it has locked up using 98% of the CPU. I've left it running for over an hour, and nothing has happened. VS 2005 on my client seems to be waiting, doing nothing.
The log file on the SOS server shows nothing indicating any activity when the service is locked up.
I've tried this multiple times, rebooting both the server and client machines, and the results are always the same - the SOS service on the server machine always locks up.
Any ideas - we were hoping to upgrade from Source Safe 2005 to using SOS but its not looking too promising

I'm using SSAPI.DLL Version: 8.0.50727.42
Log file (showing no output after CPU goes to 98% and service is locked) is attached. I stopped the service after about 4 minutes of it being locked up to flush the output to the log file.