You need to use a patched ios to install with, I don't know your trouble. Good thing you have boot2 bootmii, or you would be screwed.
Backup and format your sd card
Extract MMM_CB2.zip to sd:\
Extract cIOS60-v6174.zip to sd:\wad
Extract (4.1e)-System Menu-NUS-v450.zip to sd:\wad
Boot the wii, MMM should load
Select Wad Manager -Press A
Install 1OS236, then CIOS60, then SM 4.1e.
That should fix it, 4.2 and 4.3 suck, don't mess with them anymore.