Macs on Netware 5.1

I recently upgraded a client from Netware 4.10 to Small Business 5.1. I applied the NDS 8 ugprade. All the PC users are fine, but the MACINTOSH users cannot acces the
volumes. If I login from a MAC station I can
see that user on the server. I have not installed SP2 yet but am going to try it today, however I am not hopeful. Has anyone had similar issues?