[exim] Exim with cyrus_sasl and ldap

Hi!

I want to use DIGEST-MD5 mechanism with Exim and so try to make use of
Cyrus' SASL lib. To do so I've added line to the exim4.conf.

Exim seems to use the lib, but I can't get it to use saslauthd since
auth.log says "exim4: unable to open Berkeley db /etc/sasldb2:
Permission denied."

I also created a /usr/lib/sasl2/exim.conf which contains
pwcheck_method:saslauthd

Has someone a setup where Exim uses saslauthd over cyrus_sasl and can
help me here?

Regards,
Juergen