i had a simmilar Situation!
My Problem was the Network Name in the Serverdocument!
1. If the Network name is similiar, all Routing would go this way!
2. Network Name is not similiar, requires Connection Documents, RoutingCost , Ip Address and all work fine in my Configuration!
Watch out if heard there is a IP problem in 6.5.1 and this could also be a problem here!
Thomas (Hope this helps!)
Greetings from Austria