the message"LOADING..." on the DSi's top screen, is shows that loading Kenerl softare failed. you should confirm there're the belowing files on TF card's root-directory:
moonmemo ---Sub-directory
moonshl2 ---Sub-directory
R4iMenu ---Sub-directory
R4 ---DAT file
moonmemo ---Sub-directory
moonshl2 ---Sub-directory
R4iMenu ---Sub-directory
R4 ---DAT file