Apache being mean to sessions?

Hi, i have a php script with multiple pages and sessions. To control the
sessions i use a Cookie instead of passing it on in the URL. This works
prefectly on my own NT site. The same script hosted on an Apache 1.2.26 with
PHP 4.2.2 forces the PHPSESSID into my url wich screws up the session
handling.

Why is apache forcing the session id into the url?
Is this the configuration of the session handling? and if so what part?

Thanks for any info!

Roel