Not avalid Game Version?

[Assaberan]

Title says it all. MEF in folders. hit f8 but nothing happens, and then I type in info and get not valid game version error message thing. =\

[Kiingy]

Make sure your using the MEF from This Thread

Your game version must be 2.3.3.7799. (Newest released version)

If your trying it on the PTR, blizzard just released a new patch for the PTR, so it probably wont work.
With the MEF you do not need to hit F8, you start wow, click Find Process > Patch, or start wow using the fix.