Unable to open multiple instances of the same page to display report

Hi,

I have a scenario to implement. I need to show SSRS report on a button click(ViewReport). What I want is to open a new page(Report.aspx) on ViewReport_Click.

Now for the second time I want user to be able to change the parameters and click on the ViewReport button again to open a new instance of page, while the old page is still alive. So, that user can compare both the reports.

Now what is happening is the same web window is getting refreshed.

Please help: Its really urgent for me to get this working.

Thanks,

Anshuman