iTunes can't play new mp3 added to library (library is stored in an external hard drive)

Hi,

I had a previous discussion about "when I try to add a new mp3 song in to my iTunes library, it can't read it. It "shows" quickly the Icon of the song being transferred to iTunes, but when I research the song inside my library, I can't find it".

I had help from an user explaining that : "I should try to Place a copy in the Automatically Add to iTunes folder inside media folder to see if it is absorbed into the library or moved into a Not Added folder when rejected".

It was working, but now, I get the "error message -50". Basically, Itunes can read all the MP3 already added to my library, but when I try to add an MP3 to the "Automatically Add to iTunes folder", this file is protected (until I restart my computer, then it works).

Is there any other way (without the need of restarting the MAC) to make iTunes understand that I want to add new MP3 into my iTunes ?

Thank you.

Jen

previous help from : turingtest2