[Exim] auth cram-md5 sasl

Hi,

got plain and login working together with sasl. My problem is that
cram-md5 is not working. Perhaps there is something wrong with my
driver? I will post it for reference.

cram:
driver = cram_md5
public_name = CRAM-MD5
server_secret = "${if pwcheck {$1:$1}{1}{0}}"

Any ideas????
Mario