If you have updated to version 3.0.0-5 then you will need another console ds-lite ideally to update your flashcard , the update to the cart should have happened before the 3ds update.
If you can get use of another DS then simply follow the instructions on the flashcart website to upgrade the card then you should be ok to run it on your 3ds.
ok so my 3ds is updated last week.. so the flashcard i got today wont work. i will need a dslite to uptade it...how exactly do i do that? im a total noob, if you could help me with this abit more id be very happy. i was on the website and i cant find any information, the only thing i found is to fix a whitescreen problem that happens on the 3ds cart using a dslite. but my problem is that its stuck on a loading scree.
is this the update you are talking about?...
http://www.r4i-sdhc....tescreen_en.pdf
I had the same problem at first(stuck at loading screen).
Download both the V1.42 Wood Kernel and the Gold Kernel ENG V1.51, both available from
http://www.r4ids.cn/...download-e.html. Now open up the ENG folder. Copy the folder _SYSTEM_ and the file WOODR4.NDS to the root of your micro SD card. Now open up the folder Wood_R4iGold_V1.42. Copy the folder _rpg and the file _DS_MENU.DAT to the root of the micro SD card. Now try to boot the R4 on your 3DS. Let me know if that works.