NCARD ? I'm confussed

Hello and thankyou for taking the time to read this,i hope i'm not being thick but i use the m3 and the n5 cards and have no problems at all , But my brother has bought a NCARD for his son and some games he has backup'ed for it won't work.
Now with my cards i would say it just needed a update but i can't find one for the NCARD , could anyone help me?thankyou in advancedyourscoollent
( i hope i put this in the correct section of this site )

The firmware you are looking for is here: http://www.linfoxdomain.com/nintendo/ds/

just a quick reply, thankyou for the link just what i needed, also found an update for mine too , thankyou again for the quick replyyourscoollent