Looking for help in getting my Logitech Quickcam to work

I am new to Linux and can't get my Logitech Quickcam to work.
Do you have any suggestions?

I get this error message when I open Ekiga to test my camera:

"Error while opening video device /dev/video0
There was an error while opening the device. Please check your permissions and make sure that the appropriate driver is loaded."

I have used Synaptic Package Manager to install qc-usb-source, but that hasn't enabled my Logitech Quickcam. Thanks!

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 8.10
Package: firefox-3.0 3.0.7+nobinonly-0ubuntu0.8.10.1
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox-3.0
Uname: Linux 2.6.27-11-generic x86_64