I just did a PRMG on Krymsk RWY 04, Channel 26, three way switch on Landing mode. It works without any problem, both flags are off (horizontal and vertical needles are working)
Also a PRMG on Krasnodar Center RWY 09, channel 38, works fine.
(Maybe you should test what is actually the active runway with the tower, because somewhere i read that it may affect the PRMG)