USBChanger - for switching between USB Modes
Many people seem to be having trouble getting their phones to connect into Mass Storage correctly so PC sees the folders on the phone.
This little USBChanger app posted on E6 forum may resolve this. It allows you to easily force phone to switch between modem, storage, and usblan modes.
[I used to have to go into Setup and switch between Mass Storage to Modem and back to Mass Storage again to force phone to go into Mass Storage correctly. Now this app gets connection to work correctly first time!]
See this
thread for download file and instructions on use.