Common.mpq File can't be found! WoW wont start

[lycent]

Earlier yesterday, I was using MPQmaster and I tried to open the Common.mpq file. Nothing came up. So I basically just gave up about 10 minutes later and went to bed. Today, I tried to open World of Warcraft and it wont start, period. It says It can't find the common.mpq file. When I look at the properties of the file, it is only 65kb..

In my Data folder I have:
enUS (916 mb)
eula.tmp (25 kb)
tos.tmp (33 kb)
expansion.mpq (1,434,189 kb)
patch.mpq (1,137,951 kb)
common.mpq (65 kb)

Is anything wrong there? I know that the common.mpq is supposed to be a lot larger. Repair doesn't work, it says the file that needs to be repaired is too large and WoW needs to be reinstalled.

Is there ANY way at all that I can get a new common.mpq file without reinstalling, repatching, and everything? That would take me days..

Thanks to anyone