Buffering pauses and audio/video out of sync, single RTMP stream w/ simple embed

Hello,
I am running Flash Media Server on my dedicated CentOS host, and finally connected a single RTMP stream fine and am able to embed and play back the stream, but I am getting constant buffering pauses (approx every 5 secs) and audio/video out of sync by at least 5 seconds. My CPU with Flash Live Encoder is a powerhorse, never over 25% processor or ram usage while streaming, and my upload internet speed is averaging 6-8 mbps which should be more than adequate. I fear the issue is server side, however port 1935 is open and in use, not firewalled on CPU nor the host.
Any suggestions would be great.

Hello,
Thanks for the reply, I am using embed code generated with Flash Media Playback, as follows:
<object width="640" height="480"> <param name="movie" value="http://fpdownload.adobe.com/strobe/FlashMediaPlayback.swf"></param><param name="flashvars" value="src=rtmpt%3A%2F%2F50.62.40.55%3A1935%2Flive%2Fchristmastime&poster=http%3A%2F%2Fsq uarestream.ca%2Fpics%2Fframe.jpg&autoPlay=true&streamType=live&optimizeInitialIndex=false" ></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://fpdownload.adobe.com/strobe/FlashMediaPlayback.swf" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="480" flashvars="src=rtmpt%3A%2F%2F50.62.40.55%3A1935%2Flive%2Fchristmastime&poster=http%3A%2F% 2Fsquarestream.ca%2Fpics%2Fframe.jpg&autoPlay=true&streamType=live&optimizeInitialIndex=fa lse"></embed></object>

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