Database library give blank screen on CI 1.7

[eluser]bgougent[/eluser]
I have a strange problem.
Made a new project on CI 1.7
The moment is want to load the database lib I get a blank output screen.

So I reinstalled a blank CI, filled in my database config en loaded the lib in the CI Welcome controller. Result a blank screen

Configuration
MySQL 4.0.24
PHP Version 4.3.10-22

any idea what I need to change?