Windows 7 Two monitors

I have two monitors connected to my computer. But windows 7 detects only one.
What to do?

what videocard

what video card do you have and do you have the newest drivers. i have an ati hd 4650 on one monitor and my tv and i had to get the newest catalyst software try that.

i kinda go same problem just no tv... catalyst doesnt like me... its installed but still wont detect two at the same time... i can swap moniters by using ati control panel.... doesnt help though

Ok, Look out your video card, , Make sure it has the newest drivers and make sure the screens are correctly connected and restart the PC, if the problem persist, Put video card into force detection, on Nvidia Control panel and/or Ati Catalyst

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