Any Body knows my problem ???

Dear All
Hi I am using windows98 to connect to a WindowsNT4.0
Server, I also have Windows2000 server and Novell server
I used to connect directly to windowsNT server and from My
computer(win98) I used to take windows2000's shared
folders. But when working all of a sudden network
connection is getting lot and I have to restart the
computer to getback the connection restored. Can u guide
me on this problem pls

Thanks and Regards
Anver