We have replaced our BM3.7/NW5.1-Server with a BM3.8/NW6.5 SP2-Server

I have create a new Radius Dial Access System and a new Radius Profile. Then i testing with the NTradping from Coolsolutions. I received at the radiusconsole the following message:

[2005-01-09 01:17:12 PM] Access Rejected, admin, Miscellaneous error (-1639)

Can someone help me ?

Radius.nlm version 4.14
Nmas.nlm version 2.68