I missed that one, I'm so sleepy
Anyway, with MSG_ONE_UNRELIABLE I had problem that all players were kicked from the server with the reason "
Host_Error: WriteDest_Parm: not a client" when I used command to start rain, BUT when I replaced MSG_ONE_UNRELIABLE with MSG_BROADCAST everithing worked just fine.
So I want to thank both of you for helping me with this one becouse i was trying all day to do this, thanks.