NetStream.Play.Failed error when using RTMPDump on b2b.mtvni.com

[JALsnipe]

Hey guys, I'm new so sorry if this is in the wrong forum.

I'm trying to snatch the Drake and Josh video at this link (click on the English trailer), but I keep getting a NetStream.Play.Failed error with RTMPDump:
http://www.b2b.mtvni.com/mtvni/progr...drake_and_josh

Here's my command:

./rtmpdump -r "rtmp://cp79285.edgefcs.net:1935/ondemand?ovpfv=1.1" -a "ondemand?ovpfv=1.1" -y "mp4:/root/international_program_sales/b2b_site/trailers/01_11/225971_drake_and_josh_384x288_600.mp4" -o drakejosh.mp4

Here's the log:

RTMPDump v2.3
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
ERROR: Closing connection: NetStream.Play.Failed

I'm using rtmpdump-2.3 via Terminal on my Mac OS X 10.6.7 Snow Leopard on my i7 MacBook Pro.

Any help would be greatly appreciated. Thanks!

-J