problems getting the GET method to work properly

I am using a winnt server 4.0 box with apache 1.3x and php 4.2.x to serve some intranet pages. The strange thing is that i am not able to use the get method properly. Has anyone an idea of what am i doing wrong? at least I need the session id to be populated by gets. A last thing, I realized that this only happens when I use a web form, because using an anchor is perfectly working... thanks