I think my problem had to do with my ISP blocking ports they claim notto block.  As soon as I forwarded from Port 5000 to my sub-1024 wellknown port it all started working.   There is an excellent chance thiswas not a problem with the Cisco.

I have the identical problem, attempting to forward to 192.168.3.19. have set up port address translaton 81->81 with the destination IP and also setup fort forwarding. Furthemore, tried each one separately as well as in combination. No luck.