Date index for Aug 2004

Hi, there:
        I'm using mysql 4.0.20, PHP 5 and Apache2 web server on WINDOWS 98.
        When trying to run setup.php during installation of achievo.1.0.4 y
never get asked for a user
name and password. Actually there's an output: a blank page.
        I tried the Hello World php page and it worked. I also enabled de
PHP extensions for "mysql", but it kept
behaving the same. May it be a problem with mysql? Should I expect an error
message?
        I will be most thankful for a hint about where could I continue
looking for an error.

Thanks in advance.
                 Facundo