Black Ops Loading problem

Each time I try to load a Multiplayer game on Black Ops, it gets to about 95% before slowing down and eventually freezing. I have great connection as W@W still runs fine and so does Zombies. I've cleared the cache and have tried everything but still it doesn't let me play any games. The odd chance I do get into a game, I run fine until the next match starts and I'm unable to load.

Please, help.