0028:c37414ee

I hav 2 Questions

First one
My client works on Netware 3.12 server and nodes on win98. when ever a message is sent from server the node gets hanged and reset is required.

Second
whenever the system is left un-attended for 10 mts
it gets hanged. what couild be the possible cause.
it also sometimes gives error @ 0028:c37414ee

Thanks