I've looked through all of Codemasters/Datel's support articles for the AR DSi, and most just state to check the drivers, update the firmware, or reset the device- but both a firmware update and device reset require the AR DSi PC software to actually recognize that it's connected. I even entered a code manually and everything worked fine- it just can't connect to a PC properly. The AR DSi works perfectly fine in an actual DS/DS lite, but not a DSi as the firmware is out-of-date. At first, I thought it might be a Windows 7 compatibility issue, so I switched over to an old Windows XP desktop but it shows the same error when the AR is plugged in. If I try to update that driver to the actual Action Replay DSi driver, it ignores it entirely. Despite that, it still installs a generic Unknown Device driver for it. A Windows pop-up appears when I plug it in, stating 'USB Device Not Recognized' and that the device has malfunctioned.
Right now, I'm trying to get my Action Replay DSi (microSD version) working, but I've run into an error whenever it is plugged into my computer. I've been going through all my old flashcarts and cheating devices lately to update them and get them working as much as possible, and didn't have any issues with my GBA Action Replay or R4i 3DS.