Listening port blocked with router port forwarding set.

The listening port indicator shows yellow and info bubble says port is blocked,
The router firewall has port forwarding set for the listening port.
Software firewall has port forwarding set for the listening port.
I have tried disabling the router firewall, shutting down the software firewall, disabling the anti virus and web-shield.
Even with this risky removal of everything that one may expect to block port access, the yellow light stays on.
I have tried using UPnP. random ports, and various fixed ports all to no avail.
Is there something I,m missing? Any help will be much appreciated

BitComet is version 1.36
I'm running .Windows XP pro 32 bit.
I have Talktalk fiber up to 70 Mb/s.
Router is Huawei HG533.
Software firewall is Comodo.
Anti-virus is Avira free and Webroot Secure Anywhere full.

Thanks in advance for any thoughts you may have.