well i tried more than ten times and i cant play some times he report me a bug and sometimes the screen is whithe but i can hear the music help plz 

Can you post the error you receive?

well the main problem is i just see the error window one time the mos of the times i jus see a black screen and hear the music and wen i try comp. mode he just say  FROClientPatcher is inconsistent

From what your stating I will do my best to help you: Try deleting all the content in your c:\program files(x86)\fantasyrealmonline\patches\ folder. Run the game from the shortcut and see if patching can complete after performing this.