"you can't use that"

Hey, i am trying to buy for my warrior on horde side, the grievious 2h axe, because i do not have enough time to play. BUT everytime i try buying the weapon from the market place, a RED popup Shows up, and says "you can't use that" And i do have anything, i have the coins, the character.
Please help me. Ty
PS: i tryed with every 2-H weapon (sword/mace/axe) from the horde side... none works.

Yeah same here, please fix it.

Go to website and send a webticket. Support may help you.

i did it after u sent me the pm. thx for the help tho :D now its just a matter of time :D