using the PHP command sqlite_open() is producing the error Fatal error: Call to undefined function sqlite_open() in H:\Program Files\Abyss Web Server\htdocs\install.php on line 46

Before anyone jumps in and says that the install path should be C:\ note that when windows was installing it chose H:\ as the install path. So far I have had no problems with using PHP on this install, this error is a first.

Any ideas?