Visual SourceSafe 6.0 and NIS2009. I've tried everything. Help?

When I try to check in my files to the Server, NIS2009 intereferes, causing write delay failures.

 

This only happens when I use NIS2009, never NIS2008.

 

Here's what I've tried so far:

 

#1. Make the Server and Client PC's Full Trust with each other.

#2. Give SourceSafe programs full Access Trust control.

#3. Make a New General Rule, enabling total in / out access to those on the same submask network.

#4. Silent Mode.

 

 

None of these things helped. I still get data corruption when I try checking in, and checking out from the Client PC to the SourceSafe server.

 

Help. What else should I be doing?