Wired TomTom GPS Navigator

I'm having problems getting my View Sonic V37 Pocket PC to get a GPS
signal with my wired TomTom GPS Navigator device.

It used to work fine until i upgraded my PPC to Microsoft Pocket PC
2003, from 2002. This was so i could use a wireless SDIO card. That
works, but now it seems like my GPS has died. Is there any way to check
if it's my GPS device that has died, or if there's a problem with my
PPC?

The GPS device has a flashing red light, and i have tried positioning
it in different places in the car, and driven around for a bit to see
if it would pick up a signal, but to no avail.

Can anyone recommend anything?

Thanks in advance

Dan