Basically when i use my neighbours wireless connection (with permission i may add) my xbox 360 connection to xbox live works fine all be it rather slowely. I am connecting my xbox live through an ethernet cable through my computer which is connected to a Linksys Adapter. The intenet using this adapter works fine with my sky belkin router until i turn my xbox on and try to connect to xbox live. Then the internet wont do anything, even ping.

So basically when i try and use my sky connection through the adapter when trying to connect to xbox live. everything fails.

Please help
i have no idea what to do.
its a strange one