[X4U] iChat Audio Problem

[Robert Salter]

Since upgrading to Tiger I am no longer able to initiate an Audio 
Chat with AOL AIM users - the telephone/audio icon at the bottom of 
the iChat Buddy List window remains disabled.

Video (chat) with AOL AIM users is working fine.
Audio and Video chat using Bonjour is also working.

OS X version 10.4.2
iChat Version 3.0.1
AOL AIM Version 4.7
The Microphone Option in the iChat menu is enabled

Thank You in advance for any suggestions and/or comments.  rsalter at mac.com