Help! Acekard 2i

I really need some help. i updated my DS firmware to 1.4.1U without knowing it and now my Acekard wont work. How do i fix this???

http://gbatemp.net/t218103-updated-n00b-guide-to-setting-up-your-acekard?
go to section 11, but you will need a ds lite, or original, or dsi with firmware lower than 1.4

Thank you so much! it worked great!