Dynamic URL in URL Sequence

Hi,

i am trying to setup an URL-Sequence for an Internal site.

The Login page uses Post Variables for username/password and some hidden fields. With an succesfull login the page sends a page that redirects to the destination. In this redirect page is an session variable called: si

Basicly it looks like https://somepage/somepage.htm?si=123456

I need the si and the dynamic value on all subsequent sequence calls.

I tryed to put $si into the request parameter to get the session id in this field to all subsequent sequence requests. That didnt work. Watching the Access-Logs shows that it is not putting the si to the subsequent requests.

Am i missing something?

I need help on this case thx in advance.

Kind regards