How to project a webcast split screen through a projector

I'm using a Latitude 610 for a webcast and can not get the presentaion to show on the projection screen what I see on the laptop monitor. The presentaion is showing a video on the left and a powerpoint slide show on the right. It looks fine on the Laptop monitor but, the video over rides the powerpoint slide and shows full screen on the projector screen.

 

I'm using a Proxima 9250 projector, any help would be greatly appreciated.