Java is the component of your browser which allows interactive graphical elements to appear in a web page.
Firewall programs can be configured to block certain types of interactive content like Java Applets.
If you have a firewall on your computer, ensure that the settings do not block Java Applets.
Depending on your firewall program, you could allow Java Applets for the www.jigzone.com web site only, or alternatively allow all Java Applets.
If you are accessing the internet within a corporation, your corporate network may have a firewall. Contact your network administrator for further information.