You have succeeded in bricking your wii with the dreaded 3.4-preloader brick, the worst brick of them all.
You did not follow the guide "step by step"
Backup and format your sd-card
Place wadmanagers boot.dol in sd:\
Download IOS50 v4889
Download System Menu v385 (3.4u)
Place both wad in sd:\wads
Hold reset and boot wii
Wadmanager should start, select ios249
Install Ios50 first
Install System Menu second
Go back to the 3.1-4.1 guide linked below
Do step 4 and step 5, installing ios60patched, then upgrading to 4.1, then installing priiloader.