Motion Tracking: Analyzes only first 6 frames ?

Hi,

I using the FCP "Send to Motion project" command on 2 clips (1 HDV video+1 still. I tried with various material and various FCP sequences and I always end up having a weird problem and maybe someone here can tell me what I?m doing wrong. I set the in and out at the beginning and end of the clip in the Motion timeline (actually, they are set as such by default). I apply the Motion tracking behavior to the still. When I click ?analyze? in the Motion tracking Hud, it analyzes the first 6 frames and then stops as if the task was complete. I tried starting from the end instead, it did the same, analyzed the last 6 frames only. In FCP, the still's duration is the same as the clip underneath, same thing in Motion 3.

Any idea what I?m doing wrong?

Thanks