GroupWise

Server abending every time…
I have Novell 411 with groupwise 5.5, I have my MTA on a different server and Im also running Webaccess.. My GWIA keep crashing my server, checked for file updates, applied patches, checked my Fire wall…etc..
What could be the problem, Like I siad, my MTA is the only one setup on a different server.. Could this be the problem