You may have a double NAT effect.
The issue probably lays either at the wireless 2200BG settings end or the Belkin router. Most Belkins these days do have UPnP support but yours either may not be set to do so in its settings or has unreliable UPnP or simply does not possess the UPnP ability.

This does not look like the model version number, more like a descriptive name of that version.

Belkin usually hide the model number on the bottom of the router. It will be something like F1PI242E or F5D5230-4v2 or F7D2401v1 or F9K1105v1 or something similar to that. It will most likely be listed below the model name on the bottom of the router.

Do you know how to log into your Belkin router using your browser? One thing you can check is to see if UPnP is enabled. The initial Status window may list UPnP under the Features listing. This will at least show if it is enabled or not. Where the UPnP on and off switch is varies between models.

Log in address will vary between Belkin models. It might be either:
192.168.2.1
10.1.1.1
which you would copy into your browser's address bar. No need for any www or similar before the number. Just the number alone. Or at most, for example Password is often either admin or leave blank.

The Intel pro/wireless 2200BG settings
Is there a control panel that has these settings? If yes, check that UPnP is enabled.

UPnP is a system that allows a software program to communicate with a router to temporarily open one of the router's ports for incoming messages whilst the program remains open. Otherwise the ports remain blocked via the router's NAT settings.
If there is no easy answer to getting UPnP to work or UPnP does not exist in the router's firmware, then port forwarding would be the best step.