HELP! youtube and video streaming problem on 3G

Hi,
I upgraded from a curve to the new bold 4 months ago, my curve used to stream you tube videos off the 3G with no problem however the bold will not buffer!
I have asked around and so far no one who I've spoken too with this phone can stream media unless in a wifi area. If anyone out there allso has the same problem I would really appreciate if you would let me know and if anyone has managed to over come this problem please please message me this fault is doing my nut!
Thanks :)