When you say the save managers don't work what do you mean? Are they not recognizing your game? Are you getting a red screen? What save managers did you use? What CFW are you using if any? What firmware are you on? O3DS/N3DS? If PKSM won't read the cartridge and neither will powersaves but your DS will perhaps there is something wrong with your cartridge slot? Clean it? Otherwise we need a lot more info from you besides "This isn't working, help" to try to help you troubleshoot.