The problem is solved , guess what was causing it?!!
The MEMORY STICK lol
we never thought of that,but I began to supect it after transfering some song to it and the songs is not visible on the psp .
so I went to the store that I bought the PSP and the MS from and traded the MS with another one cause both are still in the guarantee period.
I don't anyone to be tormented like me so If that problem happens to anyone its the MS.
And thanx to all of U guys for trying to help me.
O and the videos are playing perfectly now
![Smile :)](./images/smilies/icon_smile.gif)