unknown error "-50" while importing playlist

Hi everybody.

I just bought a new computer (switching from a windows to a mac) and i'm trying to transfer my iTunes or at least my playlists. I try to export my playlist to the .xml form using the iTunes function. While importing on the new computer, i get this error: "The file "Music.xml' cannot be imported. An unknown error (-50) occurred".

I read a little bit on google and this forum and got to the point that the problem was from an error inside the xml file, a code or something wrong? I tried searching in the file using a text editor but didn't find anything. Does anyone knows a solution to this problem?

Thanks