NEED HELP ASAP as I have my first gig with Serato Video tonight. I loaded Serato Video and it played fine on my MBP. Hooked it up to an external monitor and worked ok for about 5 min then all sudden I expanded the Serato Output video screen and then it would go black and you can't see the video but the music is still playing.

I then rebooted Serato and when I click on Serato DJ to load it's fine, when I click on Video it flashes white then goes black.

Can anyone identify the problem?

Here are my specs:

15" MBP 2011
Processor 2.2 Ghz Intel Core i7

Memory 4 GB 1333 MHz DDR3

Graphics Intel HD Graphics 3000 384 MB

Running Mac OSX Lion 10,7.4

Thanks for your assistance.