Video Input FX greyed out

I'm trying to use the Video Input FX to grab a freeze frame from an incoming video feed - but the option in the preferences to enable Video Input FX is greyed out.

System details:
2208 Mac Pro
Mac OS 10.6.8 and Catalyst 4.40_m329
I wonder if it's my graphics card - that's a NVIDEA GeForce 8800 GT

I have two LFG4 cards installed, and have Maximum Active Quicktime Outputs and Maximum LFG Digitisers set to 8.
The LFG Direct API is enabled at LFG Pal 768x288 - deinterlaced.

Any ideas anyone?

Thanks!
Tim

P.S. The 2208 model Mac Pro is awesome... How glad I am of the time tunnel that gave me this futuristic machine. Or of the typo when I meant "2008" :)

can you send a screenshot?

S

Sure, thanks Simon - here it is.

https://dl.dropboxusercontent.com/u/...eyed%20out.png

Thanks

Tim

Video Input effect get enabled on the 'Video Inputs' HUD - not there...
(should probably be removed...)

Should be an 'effects' button next to the 'crop' button on the Video Input HUD

Let me know if you need more assistance

regards

Simon

Found it - works a treat - thank you Simon!

Tim