This is not a thread about DSO but anyway my advice for DSO is to download DSOrganize version 3.1129 and the R4/M3 custom exec_stub file.
http://www.dragonminded.com/?loc=ndsdev/DSOrganize
Put the Custom exec_stub File for R4 in DSOrginize/Resources on your card.
Pre-patch DSOrganize.nds and place it anywhere on your card.
Should work.
If you have further questions, Post in a DSOrganize thread.