I keep reading different posts of how the Gateway 3DS doesn't work correctly with firmware 4.1, but haven't seen a definitive post about why the cart don't work or what the problem is. The Gateway team says that 4.1 is compatible. My firmware is 4.1.0-6 and I believe that I don't experience any more problems that somebody with 4.5 firmware. If you have 4.1 firmware please post here what your problems are and I will see if I have the same problem too. And then somebody with 4.5 can verify that it is actually a problem with 4.1,