Hi,
Have you checked the Connectivity? If the device connects on wrong type of usb connection, the PC Suite cannot access the device.
Choose Settings>Connectivity>USB data cable> PC Suite from your handheld.
Should work, if the menu-line is correct. I'm running a 5310 on S40 with firmware version 05.81.
B.Sc Information tech
Phones I have or used to have: ancient Ericsson, Nokia: 6510, 2610, 5310 XpressMusic