Problem with mp3 files (avisynth and graphstudio)

Hi,

I am in trouble with mp3s with

avisynth directshowsource :
"DirectShowSource: Could not open as video or audio."

Video returned: "DirectShowSource: couldn't open file C:\foo.mp3:
Le filtre source de ce fichier n'a pu être chargé."

Audio returned: "DirectShowSource: couldn't open file C:\foo.mp3:
Le filtre source de ce fichier n'a pu être chargé."



and with graphstudio :
cannot open file



If I change the extension to another one, or with no extension at all, it does work with directshowsource and graphstudio.


P.S. :
I don't know if it is related (because ffms2 shouldn't have system dependencies, right ?) but ffms2 r430 fail to open mp3s when other old or recent builds work perfectly.


TIA