ICC Bow's not dropping

I have done ICC 10 and 25nm countless times and I have yet to see either the Njorndar bone bow, or Zod's Repeating Long Bow drop once... I have asked multiple players in-game if they've seen either drop and it seems like its very common. So my question is, is something wrong with my game? I don't know if it would be worth mentioning that my game crashes semi frequently. This is just incredibly frustrating because as a hunter, I need a high damage ranged weapon which is hard to get when I haven't had any drops, and getting PvP weapons isn't feasible.

You got unlucky in a dice rolling game? Inconceivable! Your game is obviously broken, I recommend reinstalling.

must be your client, I mean wotlk has personal loot nowadays BrokeBack