Check USB debugging status, in Settings, Developer Options down near About Phone, if it's not there go in to About Phone and scroll down to Build Number and tap on that seven times in a row, then go back to previous menu and then in to Developer Options and make sure USB debugging is enabled. If it already is, try turning it off, then using the option below it to revoke USB debugging permissions, then reboot the device, go back in to turn USB debugging on, try reconnecting remote.