EDIT: Nevermind, I got this solved.
I have an R4i Ultra, a DSi running 1.4u, and a DSL. I tried to use the R4i Ultra on the DSL so that I could apply the AK2i patch. I'm new to the R4i Ultra, so I tried running it with:
1) R4i Ultra's official firmware, which is outdated
2) YSMenu (newest...