Capture movie problem

I'm using the PSP7 to capture the image of movie.. I'm using F12 to capture the image and multiply choice.. But when I'm capture the image and it came out as black but only play as movie when it is playing.. If it is not playing then it is not showing up.. I don't know how to capture the image properly.. Please help me so badly.. I need it to make the icon because I can't make a icon that is "Something's Gotta Give" ...