[Exim] CRAM-MD5 testing

I am trying to test my CRAM-MD5 authentication, but it is not working. I can
not tell wich part is not working, the client side or the server side.

I am using:
cram:
driver = cram_md5
public_name = CRAM-MD5
server_secret = "${if eq{$1}{david}{password}fail}"
server_set_id = $1

on the server which I believe is much the same as all the examples and is the
simplest available.

My SMTP conversation goes something like this:

S: 220 david.parguild.prv ESMTP Exim 3.36 #1 Sun, 10 Nov 2002 21:08:34 +0000
C: EHLO bob
S: 250-david.parguild.prv Hello foobar at david.internal.parguild.co.uk [127.0.0.1]
S: 250-SIZE
S: 250-PIPELINING
S: 250-AUTH PLAIN LOGIN CRAM-MD5
S: 250 HELP
C: AUTH CRAM-MD5
S: 334 PDE0OTI3LjEwMzY5NjI1MTRAZGF2aWQucGFyZ3VpbGQucHJ2Pg==
string = "<14927.1036962514@???>password"
md5 hash = "2fee98f23b64cb055c945a523363ba88"
C: ZGF2aWQgMmZlZTk4ZjIzYjY0Y2IwNTVjOTQ1YTUyMzM2M2JhODg=
S: 535 Incorrect authentication data

Can someone tell me where to lart myself.

TIA.

- --
David Pashley
david@???
Nihil curo de ista tua stulta superstitione.