I have read "Howtos" and used yum to install all rpm packages.I can see rpm packages with command rpm -aq | grep XX. [root@localhost ~]# rpm -aq | grep mysql mysql-devel-5.0.22-2.1.0.1 mysql-server-5.0.22-2.1.0.1 php-mysql-5.1.6-15.el5 mysql-5.0.22-2.1.0.1 [root@localhost ~]# rpm -aq | grep php php-gd-5.1.6-15.el5 php-cli-5.1.6-15.el5 php-odbc-5.1.6-15.el5 php-xml-5.1.6-15.el5 php-5.1.6-15.el5 php-ldap-5.1.6-15.el5 php-devel-5.1.6-15.el5 php-common-5.1.6-15.el5 php-imap-5.1.6-15.el5 php-pear-1.4.9-4 php-mysql-5.1.6-15.el5 php-pdo-5.1.6-15.el5 php-mbstring-5.1.6-15.el5 php-xmlrpc-5.1.6-15.el5 This is my phpinfo: How can i make hph5 work with mysql5 thanks