Model Files Extra Versions

Can someone try using the Cannon Tower's Extra version, I can't seem to use it, whenever I try using it I get the error " Can't Load File: HumanTower_V1.mdl". I tried reinstalling warcraft but I still can't use the extra version, I can use the priests extra version though. Thanks

Doesn't work for me as well.

Extra versions are useless, except for some who actually has a difference like Lich.

Thanks a lot Malf! I thought the problem was with my warcraft installation.