Game not responding on startup

So i've played on Frostwolf before but alot of times the game won't respond when I open wow.exe(I had this problem before but then I can play until last night when the problem reoccured and now I can't play, again) I ran the program as an administrator and did unset the read-only thingy, hence why i've been able to log in before. Now all I can see is black/white screen and a notice that the program is not responding both when I clicked it and on task manager. I have no problem on WoTLK, the game started just fine without a single problem if that helps.