Help! Problem loading webpages

Bought a MacBook Pro in August, moved to my apt, bought a Belkin router. Now the problem is on Safari or Firefox that certain webpages will load but wont load completely, as in youtube.com and sometimes espn.com but always youtube for some reason and numerous other random websites. Now if I plug into the internet straight from the wall, everything works great and I go to the library or home, all pages load there and my roommates have no problems with this at all, all pages load the way they're suppose too. So what can I do to fix this problem? My understanding is that the router and my computer are not communicating properly. Help please, this is very, very frustrating.