This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
The problem is that you can't put more than one public class in a *.java file. Put the two VSG* classes each in their own file, with a name that matches the class, and put both files in the Pack directory.