Problem starting jail

[Gerald Holguin]

Hello,
I am running FreeBSD 4.9.

I am new to Unix (great learning).

I have setup the jail according to the man page with no errors and upon
completion while trying to start the jail I get this error:

bsdbox# jail -u root /home/jail/192.168.10.3/ ecj 192.168.10.3 /bin/sh
jail: execv: /bin/sh: No such file or directory

I have also tried to start the box with the following invocation:
bsdbox# jail /home/jail/192.168.10.3/ ecj 192.168.10.3 /bin/sh and I get
the same error:
"jail: execv: /bin/sh: No such file or directory"

The /bin/sh file does in fact exist under the host environment.

Anyone have some advice?

Gerald