So my first flash cart, like many others, was an R4. It's an original and not a clone. A few months ago I decided it was time to upgrade, partially because the 2GB limit wasn't cutting it anymore with a ton of shuffling all the time, but also because I was looking into getting a DSi XL at the time(3DS doused that desire). But I got an Acekard2i anyways. I have 2 DS lites, I bought a second one after my original started having game-crippling problems(mic doesn't work, R-button doesn't work even after trying all the tricks). I feel like I'm droning on here so I'll get to the point. My Acekard2i works in both DS lite units, as do all my games, however my R4 only works in my newer unit. Anybody have any idea why this could be? See until recently, I was content to just leave it that way and just use the other DS lite for trading pokemon between my games(retail and not). But I just put a new replacement shell on the old DS just for kicks and it turns out that now the old DS is working almost as good as new(R-button works 95% of the time now instead of the old 5% of the time). So I figured if my old DS is fully functional now then why not use my R4 in it for various purposes. So can anybody help me out with getting my R4 to work on my old DS now?