SolvedError When Running aIW?

Hey guys!

So I recently re-installed aIW for about the 5th time (xD lol) and I would love to jump in to the action once again and enjoy aIW's cool new features and ACTUALLY NOT BAD PLAYERS. (I have an Xbox version of MW2, and I can't even be alive for more than 30 seconds before I get noob tubed and/or get killed by some spray-n-prayer..) As I said before, I would enjoy to jump into the action, buuuut I get this error when I try running iw4mp.exe ...

Thanks to anyone who can help

Peace,
Coover

P.S. One of my friends told my that the ONLY hack that was allowed on aIW was rank hack... is that true? Because on my now-banned Steam version, I had reached max level, max prestige, and had EVERYTHING unlocked. (I played quite a lot )
P.S.S. This was originally posted on the actual aIW forums, and can be found HERE: [Will not be posted until given permission!]

Just click ok and run agian wont work restart pc works for me

Cyclic Redundancy Check = CRC. It means some of your game files' CRC hashes don't match to what they are supposed to be. Delete the caches.xml (don't need to delete cachesSxS.xml if you have it) and cache folder and then, run iw4mp.exe again. It should re-download any corrupt files and the game should work.

AlterIW has problems just get Mw2 from steam or something, not having problems out weights the price if you ask me.

Did you mod any files? Like textures?