Imac 27" won't detect samsung syncmaster dvi

A couple weeks ago I bought my first mac. iMac 27" 2.7 GHz. Before that I had a custom built pc with a Samsung Syncmaster T260HD hooked up through DVI.
Today I mini-display to DVI adaptor in attempt to connect my samsung and use it as an external display. It isn't working. Everything is connected properly and the monitor is on and set to DVI. I go to the system pref menu and hit detect displays and nothing happens. One thing that I have noticed it that when I switch to DVI on the monitor it goes for a sec and then basically falls asleep. It is still on but nothing goes up.
My computer is also fully updated and I've tried restarting it.
Please HELP!
Thanks

bump.
Just bought a new adapter and it still doesn't work.

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Message was edited by: Tyke Tyler
Message was edited by: Tyke Tyler

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Imac 27" won't detect samsung syncmaster dvi

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