I am no specialist of Priiloader but I never got this problem.
Would suspect that your hacks.ini file is wrong or inexistant.
Refer to : wiibrew.org/wiki/Preloader/hacks
Thanks! Helped me a bunch and quite a few hours trying to figure this all by myself
I cant donload the attachment in the OP. It says 'You can't download the attachment before replay' Thoughts?