[popper]

i dont know if its still the same, but you used to have to manually register your MAC adress for your PC device on the VM internal web system when using the STBs internal CM at one time, the stand alone VM-CMs dont need manual registering.

if its still the case, you might need to take the xboxs MAC, clone that into your working PCs ethernet connection and register it that way to fool the VM end, then later (after you see a working web connection with the cloned xbox MAC on the PC)revert your PCs MAC back to its original and all should be good perhaps.