System down ! with 4.28-4.1

[Denis Croombs]

I have installed this version, but when I do a restart, I get the
following:-

Starting MailScanner daemons:
         incoming sendmail:                                [  OK  ]
         outgoing sendmail:                                [  OK  ]
         MailScanner:       Can't locate Archive/Zip.pm in @INC (@INC
contains: /usr/lib/MailScanner /usr/lib/perl5/5.6.1/i386-
linux /usr/lib/perl5/5.6.1 /usr/lib/perl5/site_perl/5.6.1/i386-
linux /usr/lib/perl5/site_perl/5.6.1 /usr/lib/perl5/site_perl/5.6.0/i386-
linux /usr/lib/perl5/site_perl/5.6.0 /usr/lib/perl5/site_perl /usr/lib/perl5
/vendor_perl/5.6.1/i386-
linux /usr/lib/perl5/vendor_perl/5.6.1 /usr/lib/perl5/vendor_perl . /usr/lib
/MailScanner) at /usr/lib/MailScanner/MailScanner/Message.pm line 46.
BEGIN failed--compilation aborted
at /usr/lib/MailScanner/MailScanner/Message.pm line 46.
Compilation failed in require at /usr/sbin/MailScanner line 52.
BEGIN failed--compilation aborted at /usr/sbin/MailScanner line 52.
                                                           [  OK  ]

And my mail system is broken

Any clues

Denis