Q: Convert AVdn file in compressor 4?

Hi.

Im working with two system, apple fcpx and avid media composer. Now I want to import a exported quicktime file from avid into fcpx. I have today paid for compressor and want to convert the avdn file that avid makes as a quicktime file. But in compressor the program say: The codec is not installed!

I have not found extra codec to install to compressor. What can I do? All answers are appreciate.

Thanks, Fredrik