I'm trying out AOLserver4.5 on FreeBSD7 and can't get the control port to echo back the results of a command

e.g.

Welcome to nsd running at /usr/local/aolserver/bin/nsd (pid 1522)
AOLserver/4.5.0 (aolserver4_5) for freebsd built on May 23 2008 at 17:06:51
CVS Tag: $Name: aolserver_v45_r0 $
tlc:nscp 1> expr 2+2
tlc:nscp 2>


Has anyone else seen this or know how to fix it ?
I'm not sure of this is FreeBSD specific but AOLserver 4.10 worked fine.


Many thanks
Bernhard