I just received my SuperPad today and so far I love it; however, I also bought a case with a keyboard also, and when I connected it to the SuperPad, the shift keys don't work. This doesn't allow me to capitalize letters or utilize any of the special charachters. I connect the keyboard to my laptop and the shift key works on my laptop so the keyboard is not defective. Do I have to change any settings on the SuperPad in order for the shift key to work? Please advise.