Problem with PHP y Phorummail

Hi people: I trying to execute Phorummail script (put email into a web message board) from my shell, but I get this error message. [root@corotu docs]# ./phorummail php: error in loading shared libraries: libmysqlclient.so.6: cannot open shared object file: No such file or directory What can I do for execute this script properly, What I doing it wrong? I am running Apache 1.3.20 - PHP 4.06 and MySQL 3.23.27 Thanks, Peter Brumvig