Cant mirroring my desktop on an external monitor

Im running bootcamp (vista) on my mbp.
I can plugin an external monitor and extend my desktop as a 2nd screen but NOT duplicate it. I want it mirrored. I only get a black screen on the external monitor. Can so help?? btw. I aleady installed the driver from laptop2go. No success.
Can s.o. mirror his desktop???
Thanks in advance
Stan
ps. I have Nvidia Geforce 8600M.

If you go to the display settings tab of the displays control panel in windows then click the 'advanced' button, a window should pop up with tabs at the top. Look for the tab that takes you to the NVIDIA control panel.
There should be four icons in the control panel, one called 'displays.' Click it and it should give you options for external monitors.
Best of luck!

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Hi, mrhifi. I typed a reply earlier, but I must have hit the "Back" button instead of "Post Reply".
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Cant mirroring my desktop on an external monitor

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