How to copy songs on my iPhone to iTunes on my PC?

I have 490 songs from another computer that I want to move to another PC. I've tried doing: File<Transfer Purchases. But that's only downloaded 22 of the songs that I bought on the phone. I tried syncing and backing up to see if it would copy the songs, but only to find failed results. Please help. Music is nice.

Added (1). I have already Authorized the computer.

Is this on another Apple ID if so you will have to authorize computer. You can do this by clicking on "Store" then clicking on "Authorize This Computer". Enter in your Apple ID then do transfer purchases. This worked for me.

Ok plug oyur iphone into your computer using its charger coard with a usb end on it to fit into the computer and then if you sinc your iphone to itunes the songs should show up.

if not, alternitivly you can go to your start menu click on computer, and then your iphone should ahow up as an external divice.click on your iphone folder that has shown up as a portible or external diveice and click into the folders until you have a bigger list of folders and open the one up thats labled songs and just drag and drop them into itunes, or copy and paste them all in there, (they both do teh same thing) also make sure you highlight all the songs so your not moving one song at a time

i hoped this worked…

i know there have been problems with people saying that their ipod/iphone souldnt show up on their computer like stated above. I'm not entirely sure how to fix that, i'm having the same problem with my computer reconizing it as a portible divice like a flashdrive.although the ipod/phone will openup itunes and work there.

lol try what the other person who answered first that might solve the problem, if not try waht i sugested

Use FTP

USB Cable Or FTP