More Problems with After Effects

When I pull a key from a Greenscreen shot and then put it against the background plate, sometimes the from from the foreground plate (the green screen) cuts certain portions of the frame off, it disappears completely, or the picture gets distorted. Most of the time I then receive the error message "After Effects error: retrieving frame from video (3) (53::34)".

As a note, I am shooting all footage with the HVX200, converting files with raylight to AVI and importing them into the program as the source footage. In this particular instance, only the foreground plate was shot with HVX, the background plate is a still image I found on the web.

Any tips and/or help will be appreciate.

Thanks in advance
 
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