Using ssh remote for a nohup process

Here is my setup:
AIX 5.2 ML05 to AIX 5.2 ML05 using openssh 3.7.1

I am trying to use remote command execution from machine A 
to machine B.  On machine there is a shell script like this

#!/usr/bin/ksh
cd /dir/bin
nohup ./foobar arg1 arg2 arg3 &
echo $! > /dir/dir1/proc.pid
exit 0

On machine a I am doing

ssh machineb "sudo -u daemon_user /dir/bin/foobar.sh "

The sudo command works without a password, I test it locally 
on machine b.  If I run the remote ssh command all output 
from the script on machine b is printed to my screen. It 
appears the ssh/sudo combination is ignoring the nohup and &.  
I did not write this script, it was (poorly) provided by a vendor. 
Any tricks on getting this working.  I searched the net and 
didn't find anything.

Thanks in advance,
Jim