rex error on OpenBSD 3.8

Hello,

I seem to have sfs running on OpenBSD 3.8 on the i386 architecture with the 
exception of rex.  I am getting the following error in the server's log 
files:

@40000000440768c6005a37b4 sfssd: accepted connection from 192.168.0.141
@40000000440768c60fa491ec sfsauthd: accepted user henry from 
192.168.0.141!rexd using public key
@40000000440768c6113451dc proxy: fatal: usage: proxy

I am running sfs as "sfs -d" using the daemontools package.

Does anyone know what is going on?  What other information is required to 
debug this problem?

Regards,
Henry