Netware conflicts with VPN client

I am experiencing a conflict between my VPN client and my newly-installed Netware Client (version 4.90 SPa). In order for me to be able to see the Novell server/tree and log onto the Novell network, I must first disable the Deterministic Network Enhancer and deactivate my VPN client. I can then re-enable the DNE and connect to my VPN.

This work-around is a bit tedious. Can anyone suggest a more permanent solution which will allow both clients to function properly?

Note: The VPN client is provided by SonicWALL, but I imagine this problem would be true of any VPN company which uses the Deterministic Network Enhancere (e.g. Cisco).