I've been use kdenlive before a lot of times and i didn't had any problem before !
suddenly one day the monitors doesn't show the clip and show only the desktop ...
I tried to switch to x11 but its only half work !
http://img80.imageshack.us/img80/9046/127878842103.png
that picture is have x11 and using on ubuntu 10.04 .
the program doesn't do those problems on xterm mode and Guest mode !
Ty for helping !

I need real the help pleas ...
I want to get back to edit at kdenlive !
Atleast say me how to full reinstall of kdenlive that I will start from zero ...
Thank you for the helpers !