after installing ubuntu 12.04 i can't set 1280x1024 resolution

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http://askubuntu.com – after i installing a fresh ubuntu 12.04 on my pc... ubuntu can't detect my monitor my monitor is (philips 190c 19") with ubuntu 10.10 i was used 1280x1024 and on nvidia drivers i was able to see my monitor brand...but on ubuntu 12.04 i can only see crt-0.. iwa s try also with the command xrandr to add a new mode without any success... also i've attached a link with a photo of the problem... please help!! link: https://docs.google.com/open?id=0B0IgUTdmDB3-eUJLVWpDMVVqMWc (HowTos)