When installation comes to the point load debugger module, abend failure

My hardware is desktop PC, with 512M memory, 10G disk. Software is 90-eval
netware6.5 downloaded from Novell.com. When I use Netware6.5 + sp4 overlay
version, it's all OK(at the same machine). But I need test Netware6.5
without SP. Besides, if I install this one at virtual machine, it's OK too.