Hi. For the past few days I have had trouble using the website MasteringPhysics.com. It requires the use of the Flash Player which I have installed. The issue occurs when I need to input an answer into a text box. I click on the text box but unfortunately they keyboard does not popup, not allowing me to type into it. Is there any way I can fix this issue? I have tried multiple browsers but to no avail. Thanks for your help guys.