client error on startup

Hi,
Generally Hobbit is running very well for me. I really appreciate all the
work everyone has done to make it so useful.
Problem with a client. I scp'd the client directory from the hobbit server
to my client machines. This has usually worked well except when I did the
same thing to a redhat 4.2 server.

The error I get running ./runclient.sh start is;
line 83: /home/hobbit/client/bin/hobbitlaunch : cannot execute binary file.

The privileges are good, everything else looks the same as other machines.

i also see the error ins log/messages ; modprobe: can't locate module
binfmt-464c.

Do I have to rebuild the client on this particular server? Is there a
separate tar file for clients or do I have to install the complete Hobbit
tar file?

Thanks.