I have searched the boards here and have read the threads about this, but I am still having problems. I have Mobile Phone Tools, and I have a mp3 editor, but for some reason, it says each time I try to transfer a mp3 to my phone that it isn't the correct type of file(each time it is in mp3 format). I also noticed that each time I started up mobile phone tools, then hooked up the phone, that it never gets past initialized on the program. My usb cable is a 4 pin. What is wrong with this? Do I need to download anything else in order to get it working?