Why did my x-box live stop working?

ok I had 1 ethernet cable and had it connected to the router and it was working fine. So I went out and bought another ethernet cable so that I could use the internet and x-box live at the same time. I re-hooked everything up and now my internet works but not x-box live. The x-box says something about the IP... show more ok I had 1 ethernet cable and had it connected to the router and it was working fine. So I went out and bought another ethernet cable so that I could use the internet and x-box live at the same time. I re-hooked everything up and now my internet works but not x-box live. The x-box says something about the IP address. What do I do???
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