[exim] problem with spamd (connection time out)

Hi

I've a new problem with spamassassin :(
In to my main.log i found the follow line:

spam acl condition: error reading from spamd socket: Connection timed
out

My server have 2 CPU Intel Xeon 3.00GHz with 4GB RAM.

pamassassin start with the follow command:

/usr/sbin/spamd --syslog=local4 --create-prefs --max-children 5
--helper-home-dir -d --pidfile=/var/run/spamd.pid

There is some solution in order to delay the forward of the mails to
spamassassin to prevent the Time out?

Andrea