Articulate Video Encoder Issues

Hello,

Is anyone able to help me with an issue I am encountering with Articulate Video Encoder?

I have a .wmv file I uploaded onto Articulate Video Encoder, however, half of the movie is cut off. The entire upper portion is blacked out and I can only see the bottom half where people are moving and words are flashing onto the screen. 

Any ideas as to why this is happening?

Thanks, Suzanne