So I bought a minidisc recorder for use with a lav mic to capture audio, and am trying to capture for edit in FCP. Just purchased a Pyro A/V Link from ADS Tech and my mac won't recognize it! I have been looking and looking and can't find any solutions. I need to get this audio ASAP. Specs below.

iMac 1.9GHz PowerPC G5
Leopard 10.5.4
FCP 2
ADS Tech Pyro AV Link (API-557)
Sony MZ-R37 Minidisc recorder