So, my friend and I have been playing Mario Party using download play this entire afternoon. However, after finishing playing Mario Party, he [my friend] tried to choose another game. But something happened. He has a DS Lite, and after we finished playing Mario Party, everytime he'd load the R4, the screen would stay plain white. I already checked the microSD, but the files were there. I have no idea what the heck just happened, we didn't do anything; The R4 simply stopped working. What happened?