Mining Bug

There is a bug on my warrior (Kawan) where mining greys out at 40 out of 75 and cata mining greys out at 50 out of 75 can you help me with this problem, thanks
BTW you might as well release Burning Crusade after Vanilla WoW .

Go to a mining trainer located in a zone belonging to either one of those expansions and see if they offer training in learning additional types of ore. you may need to toggle the filter drop down on the trainers window to see available recipes.

Smelting an ore goes grey before mining an ore does,