Audio problems

hello all!

I installed openfire on my centos 6.2 server with the red-fire plugins to allow audio/video chat in spark

I installed spark on several windows 7 pc’s and inserted the redire-plugin in the /plugins folder on the pc.

The chat works great.

When we try to use the audio/video chat, there is a 50-50 chance both can see the other, but in all cases, only one side can hear the other. All PC’s have adobe flash installed.

When both of us go to the test page mysite:7070/redfire, and click on the2 way audio, or the conference tests, both parties can see and hear the other.

Based on this, I can rule out any issues on the local computer. What is preventing both partied to see and hear via spark?

Thanks in advance for any input