Why "proftpd: error in loading shared libraries"

[kong khai yun]

I currently using redhat 5.2 and i download the proftpd-1.2.0-1d.i386.rpm from somewhere the site, During the installation, I remove anonftp , wu-ftpd and after that install this proftpd package. the system no complaint during the installation
but when i run the /usr/sbin/proftpd 
    the error 
    prdftpd : error in loading shared libraries 
undefined symbol: __bzero

-------------- nastêpna czê¶æ ---------
Za??cznik HTML zosta? usuni?ty...
URL:  /mailman/pipermail/pld-devel-pl/attachments/19990129/44ecbb2d/attachment.html