Stream disconnects and reconnects every few minutes

i am using Adobe Flash Media live Encoder 3.2 I am streaming live to Facebook at our church. I am using a Cannon XH A1 connected through FireWire. The PC is an hp Quad Core with 8 megs of Ram. Our internet is 75 Mbps download, 10 Mbps  upload. I need a constant stream. My bit rate is 2000 Kbps I went down to 1000 no change.