I'm unfamiliar with this camera, but a few months ago I got the same error with a Canon XH G1 and Media Composer 2.2.15. Turns out the footage was accidentally shot in 24p mode which is not supported by Avid. Hope this sheds some light on the issue.
-Dan
P.S. This may also be of some help:
http://www.avid.com/resources/briefs/Canon_FactSheet.pdf?featureID=1075&mar...
The Goods: Avid MC 2.2.15 Adrenaline, Symphony Nitris 1.6.5, Unity 3.5. HP xw8200 turn-key computers. AJ-HD1400, 1200, HDW-1800, HDW-F500, DVW-A500