Windows DUN = Disconnects Netware

Problem, While connected to my LAN (using NIC) and I attempt to use DUN (win98) to connect to an ISP I am immediately dropped from the NetWare network as soon as the DUN connection is successful.

Specs:
Current NOS = NetWare 5.1

Problem also occurred with NetWare 4.11 and up (work around was to use only IPX on the client station)NetWare 5.1 we have decided to use only native IP.

Client = Win98
Client32 = 3.30.331.0

Problem has occurred since client ver. 2.1

Any Ideas or insights would be appreciated