Help with Bluestacks Android emulator please?

I got the Dell Venue Pro8 and I have watched all the videos and read all the pages I could find about this, but nothing works. I can’t get my games to play in landscape, landscape full screen, or portrait full screen, even though it says I am. I’ve fiddled with so many settings trying to get this to work, but still nothing. On all the videos I watch, everyone that has this same tablet are playing in either screen orientation at full screen Please help me