Hey buddy, sometimes icefilms won't work when the website is down. Www.icefilms.info if my ice films isn't working I just check that if it's down then you know why yours isn't working. If the site is up and ur ice films isn't working try updating it via the repo ( anarchist repo or something like that, dunno how to spell his name!)
Also A little tip, go into settings/appearance/skin And turn show rss news feeds on. Now when you turn your xbox on and it's connected to the Internet a bit of info about xbox mod and that comes across the bottom of the screen. If your not connected to the Internet it won't come in. This comes in really useful to see if your connected to the Internet or not, and when a plug in stops working you can see if it's just an Internet connection issue.
Hope this helps