I had a friend who had a similar problem. Apparently, the cards' "sensor" thing wasn't touching the ds "sensor". She put a small piece or cardboard in behind it to push it close enough to connect and her ds was able to read the r4 cart. Hope this helps you! :)
this might help
I had a friend who had a similar problem. Apparently, the cards' "sensor" thing wasn't touching the ds "sensor". She put a small piece or cardboard in behind it to push it close enough to connect and her ds was able to read the r4 cart. Hope this helps you! :)