so 4gionz was right i installed accidentally to the nand.(cause i watched tv while i read the
tutorial lol) after i deleted the blank box i installed it to sd via EMUNAND and SYSNAND.
The game works (Tekken Advance) but now i don't have access to patched SYSNAND anymore.
yes i have AuReinand sorry. i have Custom Splash Screens so i try to explain it...when the first Splash Screen appears i hold R when the blue screen appears at the buttom(I've got installed now Lesshax so i can't see the color though...) and after that the second Splash Screen appears (loading reinand)... and then the first Splash Screen (the one with the colors) appears again and when i press R again it goes to the second Splash Screen again and it goes like this forever. but when i push nothing the emunand works nice. and when i start the 3DS without SD Card it works too. yes i patched the AGB_FIRM.
i installed it in the EMUNAND NAND but i am not 100% sure.