links to audio files not working

Hi everybody! I have added several links in a odt file to several audio files, in the same folder. But every time I have to edit the link, because it is does not work.
I get an error message like the following:

Unable to run the command specified. The file or folder /home/schede/cultura/inglese/ExamenEnglish, test 1, part 4.mp3 does not exist.

The file, instead, exists.

I tried to replace (white) spaces with dashes (-) in the filename of some audio files.
And it seems work, so far: it’s really this the problem, avoid spaces in filenames?

EDIT

Not, even avoiding spaces in filenames I get always error messages (file not found).

Native *NIX users try to avoid spaces in filenames, since many procedures require them to be masked by a backslash \. I’m pretty sure specifying

/home/schede/cultura/inglese/ExamenEnglish,\ test\ 1,\ part\ 4.mp3

will work. Sometimes it works using quotation marks:

"/home/schede/cultura/inglese/ExamenEnglish, test 1, part 4.mp3"

Thank you, but no, it seems not work replacing spaces with backslash…

I did not state replacing but masking and the difference is that there is still a space after the \