i need help to play on my no$gba plz

some games that i play like new super mario bros, well when i start it up it say could not find card please re-insert game card and try again. I keep doing that but it still says the same thing,. it does it many many games. CAN SOME1 PLZ tell me how to fix this

Read the common issues topic.
http://forum.romulation.net/index.php?topic=1462.0Use the latest version, set the backup type to Auto, use No$Zoomer, etc.

shot