Internet Sharing to Xbox Help

[McNabbMcFadden]

Hey I am in a new room this semester and I can't get my Xbox to get online (reliably).

I've been able to get on sometimes. It's Ethernet to WiFi sharing for the XBox. When I try to sign in it says I have IP issues. I set an Auto IP and I get one of two things. One occurs far more often than the other and doesn't work.
FAILING Scenario
IP Address - 169.254.66.217
Subnet Mask - 255.255.0.0
Gateway - 0.0.0.0

SUCCESSFUL Scenario
IP Address. 192.168.2.3
Subnet Mask - 255.255.255.0
Gateway - 192.168.2.1

I'm pretty bad at understanding. Networking but my guess is in where it fails is due to the gateway. My question is, how can I get it to use the Successful IP info rather than the failing one. I've tried putting in the ones that it worked for successfully in manually but it then says the network can't use static IP. I think it's because the MAC decides not to assign the set that works. I'd like to know if you know if I can make it do one of those instead of the others.

[HazyCloud]

Xbox has their own walkthrough for sharing a Mac's connection to an Xbox. This really surprises me.

http://support.xbox.com/en-US/xbox-l...nect-using-mac

[McNabbMcFadden]

yeah I've looked through the entire thing, none of it really helped me.