[Mimedefang] excel in message body

[Muhammad Talha]

Dear all

i  have installed mimedefang-2.39 on Solaris 9 clamav-6.07 on Production
mail server

with following perl modules
Digest-SHA1-2.00   IO-stringy-1.212
MIME-Base64-2.11
MIME-tools-5.411a-RP-Patched-02
MailTools-1.1401

When people try to send mail with excel in body all mail format is
unreadable
and i cant see any column and rows there all text get mixed :(

urgent help need i will i have to install some other perl modules

Thanks

Muhammad talha