Report prompts are being skipped

[tjohnston@gpworldwide.com]

I have a portal page that displays a navigator on top and a cognos viewer below.  A user can click on a report in the navigator and the report displays underneath.  I have run into an issue regarding prompts, however.  If a user wants to run a single report more than once using different parameters, he/she cannot because the prompts are only being displayed the first time the report is run.  How do I prevent the prompt information from being saved so a user will see the prompt page each time a report is run within the portal?