I got my MK2!!!
But it doesn't work

It freezes at "Erase MK2 Save" when I try to start anything..
I can't even flash the menu, and it also freezes when I try to format it.
The dumping works, but when I try to start the dumped game, at save loading it doesn't past over 98%.
I tried with beta 1,2,3 menu, Supercard SD, WMB, and 3 different SDcards.