HI
is tricky when it come to assign buttons to LG29, but is fine.
but make sure u first run the TEST
Press Win (button)+R
Press Enter
Make sure you download and install the latest drivers for,the Logitech G29/G920 wich are the same
You can file the File on the logitech Site page
Version LGS_9.02.65 x64_LOgitech.exe
https://support.logitech.com/it_ch/software/lgs
https://support.logitech.com/it_ch/software/lgs
open it and make sure allbuttons are properly assigned .
Now : close Joy.cpl
open AC and setup MANUALLY all the buttons you need..
Second tip
A better Force Feed Back look this video:
Follow each and every step of the video Above properly .
REMEMBER if the Logitech G29 seems ,to not working just close everything, AC and the LGS Suite
UNPLUG the USB and plug-in it back then open again LGS and Joy.cpl if both recognize the wheel and it's buttons.
If it still doesnt work , make sure, the wheel power is plug in a separate place ( maybe the wheel is not getting enolugh power too).
It worked for me ,hopefully it works for you too^^.