friends, i need help

I have a box LB7000B (Brazil) with a ali 3329b1. The box doesn't works with modified firms. It doesn't show the quality of signal.

Changing the tunner for the same model of the telesystem, the deco works. I am trying many firms and working in modifing firms to make it work.

I need to find a perfect clone, so, i need to know if there are decos with ali3329b1 that doesn't work with special firms, or a especial firm that fixes the incompability betwen firms and tunner (ST 0302-3).

thanks