Choppy streaming video FMS 3.5

All,

I'm new to the streaming video world but I do have FMS 3.5 up and running and have encoded some wmv and mp4 videos to flv using adobe encoder CS4.  I followed the tutorials and have created the swf files in flash CS4 and the videos are streaming as expected.

The primary issue I am having is the videos tend to be choppy at times.  They pause, run slowly, audio pops and just overall; glitchy.  Typically at the beginning but some times throughout.  The test files at the FMS admin page stream fine without issue from the same server.  We have tested the site/streams from multiple providers all at cable modem speed or above.

We are running FMS 3.5 developer version and wish to purchase the full version but I really need to fix this issue to prove it's value.

As a bit of background we are running/testing FMS 3.5 from a server with the following specs:

• Redhat EL 4.6-32
• SuperMicro X7DBU Intel Xeon QuadCore DualProc Sata [2Proc]
• Intel Xeon-Harpertown 5420-Quadcore [2.5GHz]
• OEM 4GB ECC FB-DIMM DDR2 
• Mainboard \ Onboard \ SATAII Controller 
• (2) Western Digital WD Caviar RE 16 WD2500YS  
• Uplink speed 10 (Mbps)
• Bandwidth allotment 2000 GB(Virtual Private Rack)

Any input regarding how to test to identify the issue or past experiences with the same issue will be GREATLY APPRECIATED.  If there are any experienced individuals out there that could get us up to speed quickly we could discuss that offline.

Thanks!

Keith