Help me plz with these NDS Roms!

Hi when ever i runWorld Ends with you
Harvest moon Cute
FFXII Revenant wingsit says that unable to read data please power off the DS and remove the gamei get stuck there?what do i need to do? ???

Update your firmware, like it says in the common issues sticky.http://www.linfoxdomain.com/nintendo/ds/

Thnx ill try to update then play my gamesedit1:
btw can i ask how can i play GBA games on my NDS?

Uhmmm sorry for double posting but can i ask how can i play GBA Games on my NDS?

Only with a Slot 2 flash cart like the EZflash 3in1

Ooohh so how can i get that slot 2 flash cart?

You buy it from some online store or eBay.

Also please read our [rules], using SMS language such as 'plz' is not allowed.

Sorry Seph im a newbie here in romulation XD

Some good stores are dealextreme.com or gadget-asia.com etc. Make sure you buy a good compatible Slot 2 flashcart like EZFlashV so it will work with R4 etc.