GStreamer 0.01 and accented chars in filenames

[Quentin <squentin free fr>]

I've began adding gstreamer support to my program,
But gstreamer can't find files with accented characters, I get :

ERROR (0x80be4a8 - 310393:34:49.386823000)         filesrc(20818)
gstfilesrc.c(778):gst_filesrc_open_file:<src> No such file
"/home/squentin/mp3/Artist/Björk/Selmasongs/Björk - Selmasongs -
01-Overture.ogg"
An error occured: Resource not found.

I get the same error if I converting the filename from utf8 with
Glib->filename_from_unicode

Also, I'd apreciate any help to change the volume with gstreamer.
-- 
Quentin <squentin free fr>