Depends on the phones software version, android 4 onwards uses msc rather than mtp, and it also depends if the op is using windows, as msc support on linux is a bit difficult to get working. Best thing, if your PC has wireless is download airdroid from the play store. Connect your phone to the network, open the app and type the address it displays into your PC's web browser, follow the login prompt and then browse to you picture directory on the phone and then save tthe pictures to your computer. Kies air does the same thing and should be installed on your phone by default unless your running a custom rom.