Dell Latitude D600 and a projector DELL 4100MP - projector screen is flickering

Hi there,

I have Dell Latitude D600 with ATI Radeon Mobility 9000. I connect this laptop with a projector DELL 4100MP (Analog VGA on laptop, and DVI at the projector). I can see the screen, but is terribly flickering and also I see some "ghosts". I have tried all drivers (catalyst, omega, of course the official one from support.dell.com as well). Nothing helped. I tried to change Hz, resolution, clone screens, Thatre mode.. nothing helped. My friend with HP laptop have no problem with this projector. Can someone help please ?