Frequent Abends on Netware 4.11 server

My server abends almost every 48 hours. It varies between the IPXRTR, TCPIP, and SERVER.NLMs. The box is set up identical to other netware boxes in our other offices and they do not have this problem. I have deleted and recreated the sys:\etc\gateways file and installed every patch I can think of. We are IPX 1/2 duplex switched if that helps any.

Thanks,