I've recently downgraded a classic 3ds to 4.5. All went well until I tried using the bluecard to setup the profile exploit. Didn't have much luck, it was not recognising it. I tried the bluecard on my old dsi-xl and it worked fine so I don't think it's the card. I've tried formatting and installing bluecardfix.cia into the sysnand, and it still doesn't work. I tried formatting sysnand after installing bluecardfix.cia and still doesn't work. I've tried putting scotch tape on the back of the bluecard, still doesn't work. Tried using R4i Gold card still doesn't work. So I have a feeling it has something to do with the connectors on my 3ds. However, the Redcard works through the web-exploit. Is there anyway else to install the exploit using redcard only?