Subject Line Failure.

I have a problem with my subject link filter.  I subscribe to a mailing 
list and thought I was passing it ok with this as the first in my 
.procmailrc line after my required calls

:0
        * ^Subject:WBML
        /usr/spool/mail/kf7qz


Unfortunateley there is one user from earthlink that gets captured and 
put in my IN.earthlink file later.  I thought If you put it first it
would pass it on. 

Ideas.

Thanks
Rick