publish applications from multiple servers

Hello,

I have terminal server 2012 including roles :

• Remote Desktop Connection Broker
• Remote Desktop Gateway
• Remote Desktop Licensing
• Remote Desktop Session Host
• Remote Desktop Web Access

I can publish application from that local server normally BUT ..

I have another application server 2008 R2, I want publish some applications from application server via terminal server

I install RD Session Host role on application server

now I'm trying to add that server remotely via Server Manager in terminal server to add it by RD Session Host but I getting message "unable to connect to the server by using windows powershell remoting"

both of servers are virtual

any advice ?

Thanks