Creating Report in 10g using XML Query

Hi all

I am trying to create a report in 10g using XML query. I have created the report but i want to pass some parameter to report i can anyone help me regarding how to pass parameter in XML report, because i have created user parameter in the report object navigator but its not getting on screen so that i can pass some parameter (means parameter form is not getting generated) while runnig the report.
Please help me out if anyone can do this.

With regards
Neeraj