Since i have installed OS Lion, my second screen has just gone grey. Why is this?

I can still see my mouse on it and right click for options; but there is no background and i cannot see any windows/apps.  When using Snow Leopard i didn's have this issue, it is recent, since installing Lion. I have checked the monitor, it works as a main monitor of the Windows Computer, as a monitor for a PS3, on my familys(and my) MacBook Pro as a second screen. Can anyone help?

Abdix wrote:
I am really cross with Apple for not involving the iDVD with Lion (even if it was an older version, they should atleast have made it compatible).
iDVD is compatable with Lion. I carried it over from Snow Leopard when I upgraded and it runs faultlessly. I do not know what has happened during your upgrade that has caused it to stop working properly.
Regards
Pete

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