samba - Jul 2002 - Problems Migration from version 2.2.1 to 2.2.5

Our old server had a (nearly ;-) perfectly working configuration
as Domain Controller with win2k clients with Samba 2.2.1

I was working for two day setting up a new server with the 
samba 2.2.5 binary packages for Redhat using the same config 
files, and nothing did as it should.

Logon scripts somtimes were executed sometimes not, 
on many clients (not all) win2k didn't let me log on
any more saying that the domain could't be found any 
more and i got errors when adding printer drivers with the 
Add Printer Wizzard. 

All this was working fine wit hthe old server.

Does anybody know what happend and can give me an idea 
how to get rid of these problems ....

many thanks

sebastian