I try to found the solution.
I try the dvi, (max 1600 - 1200)(above this resolution gave the computer "band width not available") the vga, (2048 - 1148) the hdmi (1920 - 1080) everything nothing worked
Till I start playing with the refresh frequencies.
I put this at 30 hz and the wonder was there !! Now I could via the DVI connector have a resolution of 2560 * 1440.
I hoop this is a help for other people.