AviMux wont let me import an avi file

[TobyGodlington]

So I have a avi file which recorded 3 different sounds (microphone etc) but when i click to add it wont add anything. It says processing for a brief moment then disappears. I've tried re installing it trying different files and restarting the pc but it wont do anything.

attached is the environment log thing.
If you could help that would be great.

[ExKoder]

I think the cause is DirectShowFilter of DivX.