Problems Running WordPress on Windows Server 2008 – IIS7

Here’s the scenario. We hired a web design company to redesign our website using WordPress. We’ve installed WordPress in IIS7 via Web Platform Installer. Our design company had emailed us all of the PHP files required to run our new website. We’ve modified the wp-config.php file (sent from the design company) database information (name, user, password, location) to reflect the correct db settings on the current WordPress installation. After overwriting the design files with the current WordPress installation, it still shows the default WordPress page after a fresh install. Am I missing something? The design company also had emailed us a .SQL file which I don’t know where that should go? Please help.