Messages get stuck in mqueue when using procmail

I'm trying to start using procmail instead of mail.local so I can filter my
messages,
but I'm getting some problems:

When trying to change from mail.local to procmail, after changing the
sendmail.cf from:
Mlocal,  P=/usr/libexec/sendmail/mail.local, F=lsDFMAw5:/|@qSXfmnz9,
              S=10/30, R=20/40,
              T=DNS/RFC822/X-Unix,
              A=mail.local -l

to:
Mlocal,  P=/usr/bin/procmail, F=lsDFMAw5:/|@qSXfnz9, S=10/30, R=20/40,
              T=DNS/RFC822/X-Unix,
              A=procmail -Y -a $h -d $u

Procmail delivers the message, but it isn't deleted from mqueue.  It
procmail delivers it again in a few minutes, creating a lot of copies of the
same message in the mailboxes.

Does anybody can help me?  I've been working on it for two weeks and nothing
I've tried had changed it....   :(

I'm using sendmail 8.9-3 and Procmail 3.14-1 on Open linux
e-server 2.3.

Thanks for your atention....



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