Why is video on home sharing so laggy all of the sudden?

It was fine before, now when I try to watch a movie or show in my ipad2 or iPhone 4 it freezes and stops every 5 seconds. It will buffer a bit but when I hit play the buffer bar actually goes backwards and it will not play, I even tried leaving it in pause fit a while but still no luck, strange thing is that I have a apple tv 2 and it works fine on there. I don't know what to do, I am in the sane room as the apple tv and it won't work on iPad/iPhone, the both have full wifi, I even tried right beside my Mac and it still freezes. Her is a shirt video of how it loads.
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Can someone please help me, I love watching movies on the iPad with headphones as not to disturb my wife, bit I really don't wanna have to load them all in there. Both ipad2/iPhone are on 4.3.3. Thanks guys.
MacBook pro (2011), Mac OS X (10.6.6)