ZyXEL Communications LAYER 3 ES-3124 - Manual (Page 316)

ES-3124 User’s Guide
314 Chapter 40 Troubleshooting
Figure 123 Security Settings - Java
40.2.1.3.1 JAVA (Sun)
1 From Internet Explorer, click Tools, Internet Options and then the Advanced tab.
2 make sure that Use Java 2 for <applet> under Java (Sun) is selected.
3 Click OK to close the window.