Final Cut Pro

So I'm working on a project where I work, we're setting up an AJA with a Betaplayer and using Final Cut Pro to capture it in a digital format, and we're getting audio but not video.  The player is sending XLR audio to the AJA and is Coax to send the video to the AJA, then we're taking a firewire feed from the AJA to the Mac....  Any ideas on how to get the video to preview?