Thunderbolt to VGA adapter issues

Hi guys,
I have bought a THUNDERBOLT TO VGA adapter to duplicate my screen on my TV, but when i plug in it my TV doesn't show anything. It shows just "Control signal", but I don't know how fix this problem.
Could you help me?
Thank you !

I have this same problem, discovered today in front of customers, when hooking up to their VGA projector. The VGA adaptor did not work very well with OSX either so running Windows under Parallels did not work either. Back in the office, I experimented with our old VGA projector, same problem, but I could get OSX to display and thus Parallels.  Back on the Win 7 bootcamp, resolution is grayed out and set to 640x480, too small to do anything.  I tried another sugestion of updating the Nvidia driver in Windows, to the latest version but that did not help. The only other suggestion that worked for others is to get a USB3 to VGA adaptor.  Aparently Apple needs to update their bootcamp drivers for the mini display/thunderbolt port. So until that happens, perhaps the USB3 adaptor will be the way to go.  I'm going to order one now since I cannot find it in the local apple stores or Best Buy.

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