I recently got my gateway card and was able to run it fine on my 3DS. However there is a really annoying problem where a slight knock on the ds will disengage the cart and it will either say i) Cart has been removed. ii) There was an error , please hold power button. It's got to the point where opening the lid to vertical a little too vigorously will cause it to screw up. I am not sure whether it's the contacts on the gateway card with the 3ds or if its the microsd and the gateway cart. I am using a Sandisk class 10 32gb micro sd if it makes a difference... I've also noticed that when putting in the microsd card it doesn't go in smoothly. I tested the 3ds with a retail pokemon X cart and couldn't recreate the problem. Was wondering if this is normal for gateway carts before I start the return process.