Video motion delay

I've build a simple video chat application. The problem is that there is a delay of seconds between video display i.e. user1 video motion change displayed bit late at the user2 window.

I'm using FMS 3.5 and FLEX.. IS THIS PROBLEM RELATED TO THE BANDWIDTH. My FMS bandwidth is 256kbps.

Here is the code of cam and microphone that I was using in my code.

                   camera = Camera.getCamera();                   
                    camera = Camera.getCamera();
                    camera.setQuality(0,70);
                    camera.setMode(this.width,this.height,20,true);
                    camera.setLoopback(false);
                   
                    video.attachCamera( camera );
                    ns.attachCamera( camera );
                    microphone = Microphone.getMicrophone();
                    microphone.rate = 22;

Please help me out from this problem.

Thanks,

Sanjay