Too many problems whth SA:0(?/?)

["rejaine@bhz.jamef.com.br" <re...@bhz.jamef.com.br>]

Hi list, 

I'm using spamassassin with qmail-rocks + qmai-scanner + clamav and I'm
having >too many< cases with messages classified  with SA:0(?/?)  

I read the FAQ and there I get this explanation:

>>> Why do some messages get tagged with "SA:0(?/?)" instead of
numbers?.

>>> SpamAssassins "spamd" daemon has a max e-mail size limit. If a
message
is larger than that size, it just returns with no score (as it skipped
it). As such Qmail-Scanner has no numbers to report, so it uses "?" to
show that happened. Also, if some error occurs within SpamAssassin,
Qmail-Scanner returns "?" again - showing that SA couldn't do the job on
that particular mail message. If you use softlimit to limit the max
amount of RAM SA can use - that can impact this too.

In my case, the problem aren't  size limit email (spam mail are too
short, like 2-5k)

So, there is another problem with spamassassin or qmail or
configuration. 

I do a google search with SA:0(?/?)  and see that solution: 

Start a spamd with args: m 5 --max-conn-per-child=1 
but this  not solved my problem...

My /var/qmail/control/qmail-smtpd-softlimit is up to 20000000
My hardware is a 2x Intel(R) Pentium(R) 4 CPU 2.80GHz (HT)  -2GB RAM
Send and reciveid email are about 20.000 per day

Any ideas