Firmware 1.4 DSi?

So today i upgraded my firmware to 1.4 :'(
I didn't know that if you do this you won't be able to run flashcards.
So what can I do now to run my R4i properly?
Should I buy a new flashcard or do something else?
Any help is appreciated.Thanks in advance!

you're stuck for the moment.

Well that sucks but thanks for the answer :P