[Help] Can not reference Renci.SSHNet

I am referencing the Renci SSH library in my project and I am trying to execute the code. I get an error saying: UNHANDLED EXCEPTION: System.TypeLoadException: Could not load type 'Renci.SshNet.Session' from assembly 'Renci.SshNet, Version=2013.4.7.0, Culture=neutral, PublicKeyToken=null'.