Can`t call from Skype to Skype for Bussines account at Polycom RealPresense 310

I have installed RealPresence 310 and setup Skype Online for it (Office 365 plan E2).

I have room account for Polycon system and when i call to Polycon from SfB account - all fine.

But i can`t call from Skype. Call is dropped.

In log i find this

72,12/Oct/2017,11:09:24,12/Oct/2017,11:09:28,0:00:04,---,sart.mythmaker(gmail.com)@msn.com,sart.mythmaker(gmail.com)@msn.com,---,sip,500,"RTCC/7.0.0.0 LyncSkypeGateway/1.0.2217.0",In,0,1,1,---,---,webui/chrome,admin,sart.mythmaker(gmail.com)@msn.com,"","","","","","","The call has ended.",16,0,---,---,---,---,---,---,---,---,---,---,---,---,none

I checked some manuals and firewall and open ports - all clear. 

Firmware version - Release - 6.1.3-390050.

Can somebody help me a little ?