Fly 2000 TV: "lock audio clock to video field rate" greyed out

[ernstblaauw]

I use Fly 2000 TV for capture. I often select "lock audio clock to video field rate" at the 'record' --> 'general' tab. Now, that option is greyed out, so I cannot select it anymore.
I changed some things of my setup:
- I selected another video renderer mode
- I selected another sound card for capture

But altering those settings back to original, is not the solution. The option "lock audio clock to video field rate" remains greyed out.
Does someone know if there is a solution for this problem?

I use Fly 2000 TV 2.38 RC2. My capture card is a Cinergy 400.
I have Windows XP SP2 installed.

[Arachnotron]

I think you only get this option if you use the internal audio ADC of the SAA7134. To do that, in settings, hardware the native mode settings must be correct (the Cinergy 400 is listed) and the "Use generic WDM card" option must be disabled.