w98 client upgraded to w2k pro

I upgraded a w98 pro client to w2k pro connected to a NT4 server, which everything worked fine. After the upgrade I couldn't print to the NT4 print server from the upgraded w2k client but can see and connect through Win Explorer to print server fromw2k client.
Also on w2k client I have a network drive shared from NT4 server that will sometimes show the red X in Win Explorer.
The strange thing is we had none of these problems before w98 client was upgraded to w2k pro. Thanks, any help is appreciated.