External Camera - Using with Livestream

[BillElverman2]

Good evening...

I've been doing some testing. I've got the following equipment:

Panasonic AG-HMC40 camera
MacBook PRO (OSX 10.8)

I have a LiveStream account, as well as LiveStream for Producers and LiveStream Procaster.

I cannot get any of the system to read the external camera. By kicking around on the web, I understand that I will need yet another capture device or card. Can anyone tell me specifically a capture device I can use with this set-up, preferably cost-effective?

Thanks,

Bill