Sphax and other texture packs doesn't want to load?

[Jaysfx]

So I'm having trouble here, whenever I load the hexxit patched Sphax texture pack it does absolutely nothing. It refuses to load it. I have also tried other texture packs and it seems to do the exact same thing.

[cainneigh]

My game lets me use SphaxBD128x just fine, but refuses to load the Attack of the Bteam custom Sphax pack. Sounds like a similar problem. If I find an answer, I'll let you know.