Video FX

I've boxed two groups to 60 now and want to push it a bit more now. I've decided to try a five man with tank and healer so I can do some instances. Im having problems trying to set up Video FX. Anybody able to tell me what im doing wrong with my setup? My problem is:

I've followed the set up video and am pretty sure I've don't that right, but once I start up the team (load them in) only four load up. The first member wont load the screen stays black. The other four members load up and work fine, im able to set up video FX on them but its no good if I cant get the five to load.

Any help is appreciated.

Do you load them into the same window? a source cannot be in the same window as the viewer(result could become like those endless mirrors, that would likely crash stuff),

Is it the ISBoxer42 VFX layout? that's default, and meant to act like the non VFX layout with a slot free,

If both of those are a no,

what video? there are a good bunch about VFX