Adapter Working but not Connecting

Hi,

I have a wireless network in my house. It's being powered by a Tiscali Broadband router (it's the package with the TV included) and consists of a PC (using it's own USB adapter) running XP and two laptops running Vista. The laptops have their own inbuilt wireless cards. Everything works fine and I can get a signal from anywhere in the house. I'm running Norton Anti-Virus on the PC and on one laptop and AVG 8 on the another laptop.

I'm trying to connect my PC upstairs using a Belkin USB adapter and not having much luck. The adapter has installed perfectly and recognises that my network is present. However, it refuses to connect (it keeps saying waiting for network and then gives up) and there is only one green bar.

When I run cmd ipconfig on the new PC I cant find any details of an IP address. The space isn't just blank - it simply isn't there.

I had to reformat the harddrive recently due to a complete failure. Could this have wiped the IP address and be causing the problems or could it be that the USB is broken?

Any advice will be greatly appreciated.

ðàçðàáîòêà ñàéòîâ íèæíèé íîâãîðîä

If you've got only one green bar, this is your problem. It can 'hear' the network, but that's not typically enough signal to communicate with it.
Since it's a USB adapter, if you have a USB cable that you can extend it with, try moving it around. Or try the USB port on the front of the PC and not the one behind it.
If none of these help, try taking the pc into the same room as the router, set it up, and try and connect. If you still have issues then suspect the adapter, but I think you'll find it works okay within range.
You could try turning any antennas you may have on your router to a horizontal position too, to see if your signal increases.