This is killing me....

I tried to get rid of the black box/strip that goes across the video when you open it in media subtitler, but it's still there.

The box 'Use opaque background' in the general setting isn't ticked, and yet, the box is still not transparent... Even in 'preview mode', the black box is still there and it's getting on my nerve... urghhhh

Here's what I'm talking about (where the pick arrow's pointing)

i108.photobucket.com/albums/n1/nappy_m/trouble.jpg

Please please help me .. =[ i have to use this program quite frequently and i dont want to change to other program cos this is the best one i've met so far....

Thanks in advance!