Try this kernel at the link below (delete the old kernel's '__rpg' folder first then copy). It has customized DATs for this card. The wood kernel this card is using (which is really Wood v1.25) and the dats from the stock kernel cause conflicts in games. The Chinese guys responsible for this don't know and/or don't care.
https://dl.dropboxusercontent.com/u/1804131/DS/DSwhite2013.zip
Let us know if this helps you.
Hi! i want to thank you because this kernel works really really well on my R4 SDHC dual-core 2013! BUT if i copy this entirely to the microSD won't work unless you put the _DS_MENU.DAT of the official kernel 1.62 to this kernel and TADAAA!!! works incredible well, and please can you tell me where i can follow or have any news about this kernel and the updates? thanks again!
Ok here was my problem, i bought this card about 2 weeks ago and install the latest kernel of the manufacturer website, it works but not so well, for example with the last 1.62 when i play Castlevania Portrait of ruin it freeze in the middle of the game, and with Ultimate Mortal Kombat don't even load the game so i was searching so much about this issue and this flashcard and there's a little information but very useful and saw it mentioned somewhere that there are 2 versions of this card 2013, yes, one REV A and REV B, and i think this info is real because i saw the kernel of 1.52 and 1.62 and there's a different .DAT files, specifically in the last 1.60 and 1.62 kernel version there's MIXINFO.DAT when in the previous versions like 1.52 there's EXTINFO.DAT and INFOLIB.DAT (yes, like the kernel that Rezatron post here) so I tried different methods (put the "extinfo.dat" and "infolib.dat" of the kernel 1.52 to the kernel 1.62 and erase the "mixinfo.dat" and works just fine, and also tried to use the kernel 1.52 but i get white screen when i boot the card unless i use the "_DS_MENU.DAT" of the 1.62 kernel in the kernel 1.52 and replace it and works just fine too) and I can finally say that the file MIXINFO.DAT is who have problems with our cards, but there's one thing a cant confirm and that's the versions of the cards because if this is true so the REV A works with the kernel until 1.52 and the REV B with 1.60 and 1.62 or the manufacturer just screw it up with the file "mixinfo.dat" or i don't know, because my card with the kernel 1.52 just works if i do like i mentioned before like the latest kernel 1.62, any help will be useful about this issue, at least i can say that there's a solution for our cards to work well without problems
Sorry for the long explanation, hope this can be useful
And sorry if my English is bad xD