It's working fine...Try updating your rtmpdump:
http://www.mediafire.com/?x4cvp5hl4m9xr#fd1bvn9gy29td --courtesy of KSV & RP
Code:
rtmpdump -r "rtmp://148.251.102.182/live/" -a "live/" -f "WIN 13,0,0,214" -W "http://p.jwpcdn.com/6/9/jwplayer.flash.swf" -p "http://www.beastvod.com/2014/05/network.html" --live -y "network" -o "2014-05-28_07-04-32_network.flv"