Postback stops working after a while?

[Mike Bridge]

Hi-

I'm having some problems with postback (using .net 1.1 on XP
Professional). All my postback links stop functioning after a while.

After a certain point, the postback links suddenly do nothing,
although everything else seems to continue working. A hard restart
seems to restore postback, but only for a while.

Any ideas on what might be causing this?

Thanks,

-Mike