That is right, Jon.
NAT is working. Anyone can get access to the internet behind the inside interface of asa.
The problem is the translation rule. Behind the inside interface ther is a terminal server. I have no idee how/where i should configure the translation rule.
interface cisco 837
outside: 1.2.3.4
inside: 192.168.2.254
ip route 0.0.0.0 0.0.0.0 dialer0
Nat: interface dialer0
Interface asa5505
outside: 192.168.2.250
inside: 192.168.1.1
ip route 0.0.0.0 0.0.0.0 192.168.2.250
no nat
Thanks