When i try to put the .Avi file into Camtasia Studio 7 this error appears...

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Any idea wich is the problem?
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Update:
When i open the .avi file with BSplayer only reproduce the Audio.
When i open the .avi file with VLC Player tell me the next:

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In inglish will be something like this: "VLC Does not support the Audio/Video "FICV". unfortunally there is no way to fix this."