Error during installation

[Rockyliu]

I've download Mantis 1.1.2
IIS 5.1+php5.2.6+mySql 5.1.11
but when I execute mantis/admin/install.php

Checking PHP support for database type:
BAD
database is not supported by PHP. Check that it has been compiled into your server.

please give some help.

[dialexia]

Looks like you didn't install PHP properly. Lets start with which windows binary you downloaded.....the insaller package, or zip package?