SAP Portal transaction iView back ground portal blank widnow

Hi Friends,

I have created a transaction iView in sap portal and when the user click on a link from the WebDynpro app , I am launching the transaction iView in New SAP Portal header less window. every thing works as I need, but in the back ground there will be another portal session is opening. Users are getting confused why whenever I open transaction iView , there is another blank portal window opening in the back ground.

I tried different iVIews options but none of them work. We are SAP NW 7.31 SP04. We are using the AJAX Based framework page.

Thanks

Krishna