blank page when autoloading database

[eluser]chic[/eluser]
Good day to all,

i have an issue using code igniter on windows
In WAMP or Vertrigo when i autoload database i get a blank page instead of the usual index page.

without autoload database, index page works fine
when autoloading database, index page went blank

this problem does not happen on linux machine. even the default
codeigniter page which displays the welcome messsage went blank too

please help.

thanks a lot