This is a strange one. We have several machines running XP-SP2 with the 4.91 sp3 client. These machines are DELL E510s with the integrated NIC. They consistently drop their bindery connections to the 3.2 server that we have. The same 4.91 sp3 client works fine on many whitebox pcs with XP-SP2 and the same 4.91 sp3 client. I am at a loss as to why this is happening. Suggestions? Should we just drop everyone to the standard MS CSNW?

Thanks for any help.