I see contacts at http://www.gadwin.com/contactus.htm
Until then look to see if the game has a native screen capture and look for other screen capture programs.
I am hoping someone can help me. i just recently went from windows XP to Windows Vista home basic, and now i am having issues with my Gadwin print screen.
I can get a screeen capture of a web page or my desktop with no problems(the image shows up fine) BUT, when i try to get an in game shot of my sims 2 game- the image is all black!-- i have always used gadwin print screen to get my in game shots(for contests and such) without an issue--until now..
soeone told me it has something to do with a feature called overlay in windows media player conflicting with the program that needs to be shut off--BUT, i am running windows media player 11 and cannot find that option anywhere! PLEASE PLEASE PLEASE help me..
thanks so much in advance.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic