Mate 21.10 & hifiberry dac2 pro

hey,

I’m trying to connect my hifiberry to my pi and used these lines
dtoverlay=hifiberry-dacplus
and
force_eeprom_read=0

in

/boot/firmware/usercfg.txt

my pi can’t find the soundcard. Am I using the wrong file?
Can someone please help?

Thanks in advance
Sebastian