I didn't use the 4.2 guide to upgrade wii.
Preveusly I had upgrade from 4.0 to 4.1 from nintendo message.
I have not put any chip if you mean this as "virgin" but it was installed the Homebrew channel.
So what I have to do in order the backup launcher and wadmanager to work properly?
I use the guide that defhead sugests and I found solution to my problems with this guide: [Only Registered Members May View Links| Click here to register]
It seems that my problem was on IOS and I reeinstall everithing and now its done for me!!
Another solution would be re-formatting your SD Card. The same problem happened to me but my SD Card was formatted to FAT. I then re-formatted to FAT32 and now it works.