You will get this error when you try to connect a machine using Remote Desktop
The Problem comes when on the target machine (the machine which you are taking remote) has its Theme changed.
To resolve it, just login in to the target machine,by direct going to the console of that server or by any tool like VNC so that we can get access to that machine.
Now after connecting just
1.Right Click on the Desktop.
2.Select the Properties.
3.There DropDown the Theams and select the theme other than the current one.
4.Click on Apply ,OK
Its done My friends
Now try to connect that machine remote, you are now able to connect it remote.