r4 help

i updated the firmware by replacing the system, moonshl, and menu files and then i turned on my ds and there was a message saying it wasnt compatible? how do i fix this problem?

which version of the R4 are you using make sure you're using the same language as yours
http://www.linfoxdomain.com/nintendo/ds/
here is a site that I got from one of the staffs I guess you can try it too.