problem using bogofilter

[Asaf cs]

Hello,

I am using Bogofilter version 0.94.4
I have about 400 ham messages and 800 spam messages.
I have trained Bogofilter with spam & ham mbox with the following code:
    bogofilter -s < spam.mbox
    bogofilter -n < ham.mbox

The bogofilter is used in .procmailrc as followed:
    :0fw
    | /usr/bin/bogofilter -u -e -p

    :0 H
    * ^X-Bogosity: Yes, tests=bogofilter
    {
        SOMETHING
    }

I get all the time that X-Bogosity YES, and spamcity is very close to 1.

What can I do?

thank you