Please consider using ventrilo as a communications device.
I find that ventrilo is much better then teamspeak. For one thing and it is the most important. You can right click on a persons name and go to add volume. You can turn up or down the volume on one single person. So if one person is really quiet and another person is loud. You can just turn up that one person.
Please try the ventrilo out and see how you like it. http://www.ventrilo.com/download.php
Please download from the client area the Windows i386 - 32bit.