Homebrew browser is not a valid wii application

I have got HBC installed and working, but I cannot get past the "not a valid wii application" for the HBB, Please help

Make sure you only have one boot.dol file in the HBB folder. Having another boot.dol or a boot.elf will cause that error to appear.

I have everything on my sd card the right way. and everything is .dol and not .elf

Again, make sure you do not have more than one boot.dol in the HBB directory (folder)

I had this same problem and what I had to do what just grab the latest version of the HBB and it worked after that.
I'm a bit late to the party but I hope that helps.