Systematic debugging (ssh_sample_cli)

I have been trying to get the ssh_sample_cli application to run. This is
with R11B5 from Ubuntu Hardy.

I copied the ssh_sample_cli.erl to a local directory, and it appears to
compile and start:

  1> c(ssh_sample_cli).
  ./ssh_sample_cli.erl:128: Warning: this expression would cause a 'badarith' exception at run-time
  {ok,ssh_sample_cli}
  2> crypto:start().
  ok
  3> ssh_sample_cli:listen(2222).
  {ok,<0.46.0>}
  4>

However when I try to "ssh -p 2222 localhost help" from another terminal,
the client sees the connection drop, and the erlang shell shows

  =ERROR REPORT==== 20-Aug-2008::11:01:12 ===
  ** Generic server <0.50.0> terminating
  ** Last message in was {'EXIT',<0.47.0>,{error,eacces}}
  ** When Server state == {state,server,
                                 <0.47.0>,
                                 16,
                                 [],
                                 [{<0.51.0>,#Ref<0.0.0.213>}],
                                 0,
                                 [],
                                 [],
                                 undefined}