I just realized there is flaw in forumotion PM system. Forumotion user on this forum contacted me via PM but when i tried to reply it says he chose option not to recieve any PM. Well, if somebody contacs me via PM, it is obvious i should reply? But, somehow, I can't do that.
So, my suggestion is to allow answering to users who contact me even they have restricted access on who can write to them because, otherwise, I can't talk to them.