Here's the link to the router.
PCI® Downloads _ We Network Your Entertainment !

and here's the link to one of the USB adapter

PCI® Downloads _ We Network Your Entertainment !

All three of my USB adapters have essentially the same manual and software but both exhibit the same problem. It seems to be a standard WPS set up. This is why I'm not convinced it's just something I've set up wrong.

Thanks for taking a look.