have you powered off?
if that failed have you done a factory reset?
if that failed have you confirmed the dongle is working on your win7 pc once you have loaded the supplied driver onto the pc?
Raydon says the drivers are built into the firmware, which means they don't have to be loaded into the kernel on boot-up. If you've tried the Belkin, which I assume you have then that may have corrupted the wifi setup, hence the factory reset. A power off reboot, followed by a factory reset if necessary, no format, is always the first thing to try as this gives you a clean configuration.
At the end of the day though, if the dongles don't work on win7 with the supplied driver then there's no chance they will work on the humax.
Can you confirm that you've done a power off reboot, factory reset, works on win7?
