The WAMP platform in case here is Win2008R2 + Apache 2.2.1 + PHP5.3.3 and + MySQL 5.1.34_64b
In php setup you'll read that to you use MySQL libs you'll need to copy libmysql.dll from mysql directory to win directory
But using 64bit release of libmysql.dll seems to give you an issue with your 32bit PHP.
So i choose to use 32Bit release of the same DLL with PHP and it works :)
