Bonjour,
il te suffit de recharger le firmware de ta carte n-card. tu trouveras le firmware a l'adresse suivantr:
http://gbatemp.net/index.php?dlcategory=51

la procédure est la suivante:
1 - insert les deux cartes dans les slots respectifs en connectant le cable USB a ton PC
2 - Maintient appuyer la bouton "HAUT" tout en mettant en marche ta console.
3 - Tout en continuant de maintenir le bouton "HAUT" appuyé, Appuies simultanément sur les bouton "L+R+A+B" pour en en mode UPGRADE (l'écran passe en mode texte rouge"
4 - Double click sur le programme "NAND_ALL.bat" pour réaliser la mise à jour.
5 - Une fois terminée l'opération tu peux arréter ta console, extraire la carte du slot 2. Redemarres la console et normalement ta carte est de nouveau disponible.
6 - Remarque si tu as besoin de formater ta carte je te donne toute la procédure en anglais.

[English]
Note: This Upgrade package is firmware 1.45 for 8G and 16G DSLinker both.
Important: This upgrade need to format DSLinker, please back your files.

Q:How to upgrade the firmware of DSLinker?
1.Insert DSLinker Writer into slot 2 and insert DSLinker into slo 1.
2.Use USB cable connect to PC USB port directly. (Please do not use extension USB cable)
3.Hold the "up" directionnal button and turn on power.
4.still holding "up", press "L+R+A+B", will enter upgrade mode(red color text).
5.Double click "NAND_ALL.bat"to run upgrade program.
6.Quick Format DSLinker(method list below)
7.Copy "xmenu.dat" to DSLinker
8.After the first time enter "GAME MODE", DSYSTEM folder will be set up.

Note: firmware 1.45 can only work with XMENU 2.53, so we need to upgrade them together.

Q: What's new for firmware 1.45 and XMENU 2.53?
1. Download Play Support.
2. Added AUTO detect save type. (SELECT + LEFT/RIGHT change, if game can not run, please change save type.)
3. FLASH 4M save support. 1158 Zelda perfect running.
4. RESET to menu support. Set save type to AUTO will support RESET function. Hotkey: (L+R+A+B+X+Y)
5. Added wireless logo if game support downplay.
6. Added a new FORMAT MENU. Holding "START+SELECT+A"to enter.
7. Save type update to 1323
8. Changed "LOADING" picture to circle 9 points.

Q: How to quick format DSLinker?
1. Insert DSLinker Writer into slot 2 and insert DSLinker into slo 1.
2. Holding "L+R+A+B+DOWN" or "START+SELECT+A"to enter DSLinker system, will enter quick format program mode.
3. Firmware 1.45 Added a new format function. Holding "START+SELECT+A"to enter DSLinker system. A FORMAT MENU will appear.
1.CANCEL
2.QUICK FORMAT
3.FULL FORMAT (If full format done, will not appear)
[UP/DOWN select, press A confirm]


Q: How to FULL format DSLinker? (Full format need more than 10mins, because of writting test)
1. Insert DSLinker Writer into slot 2 and insert DSLinker into slo 1.
2. Holding "L+R+Select+START+UP" or "START+SELECT+A" when enter DSLinker System, will enter FULL format program mode.
3. Firmware 1.45 Added a new format function. Holding "START+SELECT+A"to enter DSLinker system. A FORMAT MENU will appear.
1.CANCEL
2.QUICK FORMAT
3.FULL FORMAT (If full format done, will not appear)
[UP/DOWN select, press A confirm]
* Tips: I suggest dslinker user make a FULL format, if there is something wrong with the DSLinker.(one time FULL format is enough)

Useful suggestion:
1. 98\win2000 user should "eject" the udisk safely before close the DS, because 98\win2000 background program still writting the flash after finish copy files, otherwise it maybe corrupt the fat of dslinker.
2. winxp user should wait 3 seconds after finish copy files, otherwise it maybe corrupt the FAT of dslinker.
3. At USB mode, if the text flashing red color, that mean writting the dslinker, please do not turn off the power, otherwise it maybe corrupt the FAT of dslinker.
4. If chkdsk program can not fix the FAT error, use DSLinker quick format can recover.
5. Do NOT format the dslinker by windows, it will slow down the UDisk system. Use DSLinker quick format can recover.
6. Suggest use "SD Formatter V2.0" to format DSLinker, can be download from www.sdcard.org
7. Japanese, Trandition Chinese support. Copy Moonshell system.fon system.12u system.ank to DSYSTEM
8. I suggest dslinker user make a FULL format before use it. Full format need more than 10mins, because of writting test
9. Battery test hold key change to "L+R+SELECT" when enter DSLinker System.

Bonjours, Pokemon

Merci pour les renseignements c'est trés sympa. Le souci c'est que je fais exactement les consignes mais la DS n'es pas reconnu en usb comme lorsque l'on mais une clé ordinaire. de quoi cela provient-il?

Je branche tout comme il faut, est rien ne ce passe, Je n'est méme pas le choix de choisir le mode game ou USB. je me pose des question.