You can't mix DARKCORP cIOS's with Nintendo IOS's. You have IOS60 (ver6174) which is the Nintendo. If you are going to stick with DARKCORP (which I don't recommend) then you need to reinstall IOS60 (65535). DO NOT UNINSTALL IT!!!!!! JUST INSTALL OVER TOP OF IT AS YOU HAVE BEEN DOING!!
If you want to remove DARKCORP then follow this guide here. It will save you problems like this in the future.