ok m8, summit not right here.
when nintendo udated the dsi to 1.4 then 1.4.1, this blocked alot of flashcarts.
on both ocassions a patch was released make the acecards work again.
if your card is new, it should already be compatable.....
1. what console are you using?
a ds or dsi, if dsi which firmware is it running?
2. what symbol (if any) does the card show up as on dsi.
take the sd card out the acecard for the moment.
switch on the consloe and insert/uninsert acecard.
look for a card or game symbol appearing in the bottom screen.
the symbol it should come up as is " alex ryder stormbreaker".
or does it say a diffrent symbol or does it say " no card inserted?"
do you have a dslite you can use ?