TCP Cooked connection ?

Why is this happening?

11-13-2012 16:40:04.778 +0000 WARN  TcpOutputProc - Cooked connection to ip=IPADDRESS timed out
11-13-2012 16:40:12.778 +0000 WARN  TcpOutputProc - Cooked connection to ip=IPADDRESS timed out
11-13-2012 16:40:33.779 +0000 WARN  TcpOutputProc - Cooked connection to ip=IPADDRESS timed out
11-13-2012 16:40:34.778 +0000 WARN  TcpOutputProc - Cooked connection to ip=IPADDRESS timed out
11-13-2012 16:40:34.778 +0000 WARN  TcpOutputProc - Applying quarantine to ip=IPADDRESS  port=PORT#_numberOfFailures=2
11-13-2012 16:40:54.778 +0000 WARN  TcpOutputProc - Cooked connection to ip=IPADDRESS timed out