With the new the patch model edits like patch-2.mpq are said to be causing error to fix this problem you will have to redo the model edit because of the new patch and the new model type, and rename them to Patch-enUS-#.MPQ and then place them into you enUS folder which is found in your data folder.
I belive this name will only work for the players who use the us version of Wow not the euro version. I am still not sure what the euro one is.
Skull
[EDIT] the euro one is Patch-enGB-#.MPQ i think put it in enGB folder in data