For about a week or two now, everytime i plug my ipod it will charge, but it wont show that its plugged in. Ive already tried updating itunes, unistaling it and reinstaling it, restarting my ipod and nothing works. What do i do?

I’ve tried everything and nothing works!!!! I installed the app on my ipod and when i get to itunes its not listed under my ipod. I’ve changed my firewall to off and i’ve changed the preferences to look for devices. My ipod software version is 3.1.3 and im using a toshiba laptop- (if that helps) Is there any other ways to get my ipod touch remote app to work?