Remote Desktop Connection

I have the VPN and Remote Desktop Connection installed on my computer so I can work at home. Problem is when I go to connect to my remote desktop it gives me this message. If anyone can tell me what I need to do to connect, I would greatly appreciate it.
The client could not connect to the remote computer.

Remote connections might not be enabled or the computer might be too busy to accept new connections. It is also possible that network problems are preventing your connection

Please try connecting again later. If the problem continues to occur, contact your administrator.

Thanks