r4igold Deluxe/ Problem with getting into r4igold mode ( select does nothing )

Hi, I just got my 3ds ( old, from 2014 ) . system 4.5 EUR
I formated SD card 4GB and micro SDs ( 2 of them one 2GB and one 16GB ) into fat 32.
Then I placed ==Wood 1.64== into small micro SD, placed it in one of cards "gray one"
I followed instructions and everything was just fine.
Then I placed SD card into 3ds with ==Firmware 4.0B1== ( I'm aiming to run MH4 )
After getting into Profile and Nintendo DS profile, device reboots, after 5-8 seconds like it should.
BUT when I press Select button to check for games on withe card.....
NOTHING HAPPENDS
so i cant select game from my 16GB card. And after trying again to"Profile ->Nintendo DS Profile" i get error massage.
I try ed 2 firm-format device and create new profile form beginning but nothing helps. \

EDIT: Just checked. SELECT button is working , so its not damaged button problem


EDIT: Now i know 4.0b2 works fine but 4.0b1 doesn't. I would love to get link or tutorial of instalation 4.0b1 to run mh4.

PLEASE HELP ME :3 ( sry 4 language, I'm PL and typing on touchscreen)