The right click chat option in Ghost Solution Suite is not functional.  

Symantec Ghost Solution Suite
This operation is not available for x64, ia64, Spark CPU architecture(s). 

There are a few different features that have been deprecated from the GSS console but have not been updated in the GUI.    Chat is one of those features. 

With the release of GSS the focus has been to be a primarily imaging tool and some of the other features that were less related to imaging have been deprecated.