I've run bm38+ latest patches on nw65sp7 box. Some time, when addind new user to VPN (new vpn) I've must make stopvpn and startvpn, because server can't authenticate new user properly. For example:

"VPN ACLCheck could not find a match in configured Authentication Rule List. Authentication failed for user: z"
z is the first letter in new user login. After stop and start vpn all works fine. But sometime vptunnel.nlm not want to unload, and server console hangs. One way is goto emergency console and reset server.

I'can't understand source of this problem. May be try to update to bm39?