Make sure the card is R4i SDHC Dual Core for 3DS XL, 3DS, DSi, DS Lite from r4isdhc.com
Here is the post about How To Use R4i SDHC Dual Core 3DS Flashcart From R4iSDHC.COM But if your card can not work on the latest 3DS V4.5.0-10 and DSi V1.45. you need to update the r4i sdhc dual core flash cart with a DS lite and here is the method for you.
If you get the error code below, it means you need to update your r4i sdhc dual core flash cart to make it work on 3DS V4.5.0-10 and DSi V1.45
“An error has occurred, press and hold the power button to turn the system off, please refer to the operations manual for details. ”
Let’s get it started, update the r4i sdhc dual core flash cart.
At First, download the firmware and update patch from here: r4i sdhc dual core official site
Download both of them, the upgrade firmware and the kernel
After you download them, you will get two rar files, just extract them, and you will get the folders.
Click the folders and, you will see the update patch file and the r4i sdhc dual core flash cart kernel files.
Copy those three into the root of your sd card. then you sd card would have
Put the sd card and the r4i sdhc dual core flash cart into the DS Lite console, power on
Just click the sd card icon and access the menu
Click the update patch file and start update process
Just wait until finish updating, you will see
As you can see, have updated the r4i sdhc dual core successfully. Just power off the DS lite, and put the updated r4i sdhc dual core card into your V4.5.0-10 or DSi V1,45 DSi. you will see
Do yourself a favor, don't buy crappy flashcarts.