ExtractStream failures

[mostrodrvr]

Hey guys, hopefully this is a newbie question that can be answered
quickly. I have searched the forums and the messages in this group
but haven't found an answer as of yet. Hoping to find one before I
give up the hunt. :) 

Running a Sony 30 hour non-Direct TV TiVo (SVR2000?), software version
2.5.1. 

I was able to Extract videos easily with 2.0.1 software but after
2.5.1 upgrade it nuked my TiVoNet install. I finally got around to
re-applying the hack and setting things back up like they were but for
ExtractStream doesn't work anymore. Any ideas on what has changed? 
Here are the errors I'm getting:

bash-2.02# mkfifo /var/tmp/vid /var/tmp/aud
bash-2.02# export VIDEO_OUT=/var/tmp/vid
bash-2.02# export AUDIO_OUT=/var/tmp/aud
bash-2.02# cd /var/hack
bash-2.02# nice -20 ./nc -n -l -p 1236 >$VIDEO_OUT &
[1] 385
bash-2.02# nice -20 ./nc -n -l -p 1235 >$AUDIO_OUT &
[2] 386
bash-2.02# nice -20 ./ExtractStream 823313
Attempting to locate tyStream with fsid 0xc9011...
...tyStream located, sector map follows:
Start Length
02940000 00040000
01d00000 00040000
03620000 00020000
00160000 00020000
010c0000 00020000
01120000 00020000

(it hangs here until I ctrl-c).


On the PC:

$ netmplex -a 192.168.1.53 -o /home/nathan/tivo/data/"Zim".mpeg2
Looking up 192.168.1.53
connect: Connection refused

Any thoughts?