No picture on detected external display on Windows 7 boot

Hello!
When running Windows 7 via Boot Camp 4.0 on my MBA 11" (mid 2011) and with the latest graphics drivers, even though my Benq 24" monitor detects the incoming signal (green light) and even though Windows has identified the external monitor, I cannot see nothing but darkness. It works perfectly on the Mac boot but for some reason Windows won't quite co-operate.
I have tried searching the web for this problem but it seems as if no one has encountered a smiliar problem. Can anyone help me?
Thanks!

You should ask in the Boot camp forum where the Boot Camp gurus hang out. https://discussions.apple.com/community/windows_software/boot_camp

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

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