PXE Imaging Laptop with Realtek 8139 Network Card

I am using Zenworks Desktop 7.1HP5 on Novell 6.5 SP5. I was able to set up
the laptop and send and image to the server, but I am not able to restore
the image to a new laptop. I have 75 of these laptops to image within the
next 1 1/2 weeks. When I PXE boot and manually go into imaging, everything
seems to work fine until I Restore and Image. It will start and after 4 -
10 sec. the screen freezes. Any ideas on how to correct this?
Thanks,
Kathy