360 Live Connection?

Man, I'm having a BITCH of a time attempting to update my Live account to my 360 so I can get online..

My old modem setup that I was successful in using before is gone, and replaced with a new modem, Touchstone Telephony Modem. I've power cycled the modem, turned it off prior to connecting it to my 360, all to no avail.. That was all I had to do in the past, however it's not working now.

I'm currently on hold with Comcast right now to see if they can help me, and if not, I'm going to call Xbox Live customer support. I tried all their online suggestions already.. This sucks. I actually got the initiative to update my shit, and I can't do it.

DOH!

BTW, when trying to connect, it can't establish an IP address. That's where I'm stuck.

Anyone have any other suggestions or feedback for me?