There are basically two things that have to happen:
Your server administrator has to turn off the packet/connection signing requirement on the server. (this will not be necessary with 10.5) This might just solve the problem right there.
But you can get even more with the second thing: someone with the authorization to do so on the server must use Directory Access (in Utilites) to bind your computer to the domain. This will allow you to then log in with your Domain Credentials (what you would use to log in to Windows) and automatically get your netowork home, and use "single sign on".
Note: this will not get you access to the print server. That is possible, but a bit outside the scope of this hint.