Mac PTT issues

[robynln]

I am trying to get my logitech headset to work with ventrillo.

Issue one PTT, I cannot set (and do not know the default) PTT button.
There is not a field to allow me to choose the button I would use (unlike the PC version)
Here is a screen shot of the setup:
http://docs.google.com/fileview?id=0...thkey=CNeR09EN

Second, Ventrillo does work without PTT mode for my builtin microphone, but when I select the Logitech headset, it does not pick up the mic even if I set the sensitivity to max. I double checked that the microphone worked in the settings for the mac (via preferences) and the mac does hear/see it.

(oh just in case, yes I did turn on the accessiblity options).

Thanks
Robyn