World Builder not working

[rimmer dall]

I get and error report. Failed to invoke received "UnitTypes":
Unable to read beyond the end of the stream. Application: World Builder
User: Unkown (Not an in-house user.)
Time: Monday 2/20/2012 5:37:14 PM

Runtime: 32 bit
OS: Windows 2008 (Service Pack 1)
Machine: OWNER-PC

Note:
Failed to invoke received "UnitTypes":
Unable to read beyond the end of the stream.

Exception: System.IO.EndOfStreamException
Source: mscorlib
Thread: Main Thread
Description: Unable to read beyond the end of the stream.

Stack Trace:
at System.IO.__Error.EndOfFile()
at System.IO.BinaryReader.ReadChar()
at Firaxis.Nexus.MessageReader.ReadString()
at Firaxis.Nexus.MessageReader.Read(Type t)
at Firaxis.Nexus.MessageReader.ReadArray(Type t)
at Firaxis.Nexus.MessageReader.Read(Type t)
at Firaxis.Nexus.IncomingMessageDescriptor.Invoke(MessageReader message)
at Firaxis.Nexus.Client.HandleMessage(MessageReader message)

Moderator Action: Moved to modding/SDK questions.

 

[rimmer dall]

Still after taking out the SDK and installing again still came up this . The goty edition i have works and the map editor is ok as far as i know just no units appearing.