try rebooting the router?
I'd get another router. Maybe ask everyone to post which router they use so you know which will work.
Seriously, i've never had much luck with Belkin networking equipment in the past. The only problem is, I personally fail at wifi, and still use an old Linksys WRT54G, so I have no idea which of the current-model routers work well.
This is a version of the WRT54G series, and is actually the top-rated wifi router on Newegg. It's also on sale. It's 802.11b/g only; but if you don't need n, it might be the way to go:
I use the LinkSys Wireless G myself. No problem.
WRT54-GL running Tomato firmware. Love it.
Is the router configured to use dhcp? If not that is probably why it can't get an up address. Also I agree with the others that linksys is a better option. Make sure its set to mixed mode or the specific protocol needed for the device. Let me know if this works
Heres the thing but why would it connect to 3 other pcs fine and my xbox 360 just the phone? also this router is 75days old.. I bought it brand new... So that means I am not going to spend the money on another one right now. Its just odd to me why it works when i leave it open but then wont with a password.