Milter-greylist

I have just installed milter-greylist on my server and it seems to be 
working pretty well, but I have a couple of questions.

First, how do I get the logging to work. I'm running milter-greylist 
with one of the sample config files. I've removed the # from the log to 
file section. When I start or check (-c) milter-greylist I get this 
output...

ignored "/var/log/greylist/greylist.log" stat output line 15
config file "/etc/mail/greylist.conf" is okay

I've checked th log location is correct and that it is writable by the 
milter-greylist user (smmsp). Nothing is being written to the log file.

Second, I've found this in my log files (logwatch)...

Milter (greylist): timeout before data read, where=mail: 10 Time(s)


Iam going to increase the milter-greylist timeout as shown in the wiki. 
Is this likely to solve this timeout error?

Thanks,
Rick