i have a d2 tablet. ice cream sandwhich 4.0. when i visit the market place i am unable to download apps games or books. thusly i cant update exsisting games and apps. i had no problems downloading until a few weeks ago. it will start dwnloading then in a few seconds it will say download unsucessful. rarely it will actually complete download but when i click install it wont install. can some one please help? it seems the problems started shortly after i put the sd card in..