it is spreading gradually to other client also pl help me to solve it as soon as possible.
This doesn't look like a Forms problem. Virus on your network? Anti virus software that sees Forms as a virus? Failing switch?
And you still haven't bothered to mention your Forms version (Forms 6i is not a version). Are you using the latest Developer 6i patch set?
if i were u i would access the server's alert.log file or asked some friends at the server's site to do the search for ...
This is point number 1 u should try to attain to get reasons that bother the server ...
Pls check the following check list it also possible to broadcast ur knowledge to the problem .