Problem with r4i card

All of a sudden my r4i card stopped working. My dsi is on 1.3u firmware.I get a message that says "An error occurred......"The steps iv taken:Formatted SD card
Updated Firmware on r4i card.
Tryed card in a different dsi and ndsAnd after trying for hours all i get is "An error occurred....... :'(

its am r4i sdhc cardwww. r4i-sdhc. com

The card gives the same error in each dsi ds i try. Looks like I need a new card after all.Whats the ak2i? I hear alot about them but know very little. Iv always used r4's.How much is the r4i gold 3ds roughly and will it work in my dsi

In my opinion, the ri gold card suck. i never recieved support from them when mine wouldn't update the firmware. I now use the cards from r4isdhc.com, and they work okay. on the latest ds firmware as well.