New User - no video in center screen

Hello everyone -- I just purchased Mixvibe 3.0 and it's not working on my macbook pro (i7, 8 gb ram, OSX10.6.8)
No video playsback in the center window or the externally attached screen. The window displays full on the external screen but it's blank. The preview windows work just fine and when I double click on the center window it goes full screen externally but it's blank.
I tried the demo before purchasing and the center and external window were blank with a watermark overlay.
Otherwise -- would love to get this working, seems it would fit my needs perfectly ...
Please advise and/or issue a refund as soon as possible.
sincerely,
Jay Sanchez
No video playsback in the center window or the externally attached screen. The window displays full on the external screen but it's blank. The preview windows work just fine and when I double click on the center window it goes full screen externally but it's blank.
I tried the demo before purchasing and the center and external window were blank with a watermark overlay.
Otherwise -- would love to get this working, seems it would fit my needs perfectly ...
Please advise and/or issue a refund as soon as possible.
sincerely,
Jay Sanchez