External display for T520 not detected

Hi!
I have ThinkPad T520 and Samsung 17'' display with DVA output. I bought DVI-VGA adapter and connected the display to laptop's VGA input. The external display is not detected - it is not present in Windows 7 display properties and it shows "No connection, check signal cable" on it's screen. I don't think that there is something wrong with adapter, because it's new. How can I setup it correctly?
Thanks!

Hi, koles
Thank you for the information. In the past, updating BIOS was something that was rarely done, as it could lock up and not work, which would render the computer useless if it failed. Today, however, it is not like it once was. As with updates, there is still some risk involved, but there is now a utility that will update the BIOS for you. If you'd like, you can update all the other drivers first and then do the BIOS as a last resort if you would rather not try it unless you need to.
Hope it helps. Keep me posted!
Best,
Adam
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