ASA 5510 - Port Forwarding Issue

Hello,
Setting up port forwarding on ASA 5510, Ver. 9.1(6)

Have successfully created dozens forwards - they all look like this and work fine:
object network TERMINAL1-RDP
 host 172.22.35.6
!
access-list inbound extended permit tcp any object TERMINAL1-RDP eq 3389
!
object network TERMINAL1-RDP
 nat (inside,outside) static interface service tcp 3389 1975  

The only issue I have is with this particular one:
object network ECLIPSE-PROXY
 host 172.22.35.9
!
access-list inbound extended permit tcp any object ECLIPSE-PROXY eq 43271
!
object network ECLIPSE-PROXY
 nat (inside,outside) static interface service tcp telnet 43271

The telnet on the server works fine. I'm able to access it from the inside. Here is the code from my old Cisco 1800 (which I replaced with ASA) - port forwarding works. And it looks exactly like all other entries.
ip nat inside source static tcp 172.22.35.9 23 (outside IP here) 43271 extendable
permit tcp any host (outside IP here) eq 43271


Is there something special about forwarding TELNET service?