Preview update issue, Can't connect to Xbox Live.

I got one of my preview update and now I can't connect to live cause it's saying I'm missing an update and the says the update is unavailable wth is goin on I jus wanna use my Xbox dammit

8007-2746 means you're having a connectivity issue.

Its a "lovely" cycle - can't update cause it needs to connect to live, can't connect because it needs an update but can't update until it connects to live.

You can try manually installing by going to support.xbox.com and searching for console update - "Update your xbox 360 console" will have the information you need.

This is the same issue I'm having Ryenoh. I joined the preview program and now I can't connect to Xbox Video at all but I have found a way around by browsing videos and movies from the dashboard, but other than that I can't connect to the main screen of
Xbox video.

Also, when joining the preview program it said I would receive an update but I never got one

If you are referring to the Xbox 360 yes there is an update planned soon to work out and fix the networking issues with the console. Hopefully it helps, a lot of people seem to be having issues connecting to Xbox live on the console. Don't know the ETA but
a sign up for the preview is currently available. A preview takes roughly a month so maybe April or May a console update will be available to everyone.

With the new update it connects to my internet but not my xbox live and to just add to the problems i can't even get into the preview dashboard to report a problem.

And xbox says they can't help that I'll have to go though these forums and try get a hold of someone who works for the program