vWorkspace Client cannot connect RDP session

My scenario:

a) Windows Web Server 2008 R2 with vWorkspace 7.2 MR1 as a Connection Broker (WEB-SERVER-EC);

b) Windows Server 2008 R2 Standard with vWorkspace 7.2 MR1 as a Terminal Server (RDP-SERVER-EC).

c) all the machines at the same domain.

Everything is configured fine as I´d presume, but when I tried to connect into a RDP session using the vWorkspace Client, I´ve always received this message:

Remote Desktop Disconnected.

This computer can’t connect to the remote computer.

Try connecting again. If the problem continues, contact the owner of the remote computer or your network administrator.

Anyone could help me to bypass this trouble?