How to enable PHP_IBM_DB2 function?

Question

Here is what I've done so far:

1) I have downloaded php_ibm_db2-1.9.1-5.3-ts-vc9-x86.zip from http://sourceforge.net/projects/db2mc/ 2) Copied php_ibm_db2.dll to c:/wamp/bin/php/php5.3.10/ext 3) edit php.ini and added this script:

extension = php_ibm_db2.dll

4) edited httpd.conf and added this script

LoadModule php5_module "c:/wamp/bin/php/php5.3.10/php5apache2_2.dll"
AddType application/x-httpd-php .php
PHPIniDir "c:/wamp/bin/php/php5.3.10/"

5) restart wampserver

Result: I still have Call to undefined function db2_pconnect(). What did I missed?