495534 Facebook Friends Invitation feature

I have got an application running on Facebook. It is a flash game. I would like to enhance my application by adding a friend invitation/request feature (once users finish playing - they are asked if they want to share it with friends): [login to view URL] The issue is that the work was done but the invitation form comes as a popup, and as such it is blocked by most web browsers. I need you to find another way to introduce the Invitation Form (so that it was not blocked). In case it matters, its integration into Facebook was done with php-sdk. The project is ASAP. Can provide more information upon request.