Problems with procmail recipe

Hello all.

I have constructed the following procmail recipe to handle BadTransII virus:

:0 B
* ^Content-Type: audio/x-wav;
* .*name=".*\..*\.(pif|scr)"
{
    :0 c
    /var/spool/mail/VIRUS-BadTransII

    :0
    * !^FROM_MAILER
    | (formail -r -I"Subject: Virus Alert";\
        echo "We have received your E-Mail message containing I-Worm";\
        echo "BadTransII virus as an attachement. Message has been";\
        echo "blocked. Please contact PostMaster(_at_)geo(_dot_)net(_dot_)ge 
for more";\
        echo "information.") | $SENDMAIL -t -f 
"PostMaster(_at_)geo(_dot_)net(_dot_)ge"

    :0
    /dev/null
}

when I send test mail to my account with the following body:

Content-Type: audio/x-wav;
     name="DOC.DOC.pif"

it works fine and I get back my warning message. but when it handles
infected message, I get the error in my logs. I cant understand what is the
difference and why I get this error. Maybe someone can help me with it. here
are logs:

procmail: [26438] Fri Nov 30 23:24:20 2001
procmail: Assigning "LASTFOLDER=/var/spool/mail/VIRUS-BadTransII"
procmail: Opening "/var/spool/mail/VIRUS-BadTransII"
procmail: Acquiring kernel-lock
procmail: Match on !
"(^(((Resent-)?(From|Sender)|X-Envelope-From):|>?From )([^>
procmail: Executing " (formail -r -I"Subject: Virus Alert";\
 echo "We have received your E-Mail message containing I-Worm";\
        echo "BadTransII virus as an attachement. Message has been";\
        echo "blocked. Please contact PostMaster(_at_)geo(_dot_)net(_dot_)ge 
for more";\
        echo "information.") | $SENDMAIL -t -f 
"PostMaster(_at_)geo(_dot_)net(_dot_)ge""
procmail: Error while writing to " (formail -r -I"Subject: Virus Alert";\
        echo "We have received your E-Mail message containing I-Worm";\
        echo "BadTransII virus as an attachement. Message has been";\
        echo "blocked. Please contact PostMaster(_at_)geo(_dot_)net(_dot_)ge 
for more";\
        echo "information.") | $SENDMAIL -t -f 
"PostMaster(_at_)geo(_dot_)net(_dot_)ge""
procmail: Assigning "LASTFOLDER= (formail -r -I"Subject: Virus Alert";\
        echo "We have received your E-Mail message containing I-Worm";\
        echo "BadTransII virus as an attachement. Message has been";\
        echo "blocked. Please contact PostMaster(_at_)geo(_dot_)net(_dot_)ge 
for more";\
        echo "information.") | $SENDMAIL -t -f 
"PostMaster(_at_)geo(_dot_)net(_dot_)ge""
procmail: Assigning "LASTFOLDER=/dev/null"
procmail: Opening "/dev/null"
procmail: Notified comsat: "user(_at_)0:/dev/null"

any suggestions??
Thank you beforehand.

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