What problem are you having? My win2k3 server plays just fine with my Macs.
The issue is with network shares. The Mac can connect to the shares just fine, and reading information is no problem. Writing back to those network shares is Russian Roulette, however. It may work a dozen times in a row, but that thirteen time things hang up, a -36 error eventually pops up, and the share is lost. Only a reboot of the server itself will fix things.
Nasty bug.
For anyone else who's interested, you can find much more about the problem, and the woes of the many who are suffering from it, at http://www.macwindows.com