Server Lock Up

I have a Netware 5 server that locks up when I put the application launcher for Zenworks in the login script. I have to do a reboot and that is not good. If I rem it out,and the NAL does not run,this does not happen. The zen database is on another Net5 server. The NAL is for the NT machines that causes the lockup. Any suggestions as to why this may happen?
I would appreciate any help, because I really need my Zenworks. Oh, it is Zenworks2 that I use,Netware 5sp5.