Unable to load class sun/plugin/javaRunTime

System

I can go along editing my .tpl files and then all of a sudden I will go back and try to edit one of the previous editted .tpl files i will get a popup window telling me :

The Bridge was installed at <> but the class is not there.

Modify the registry key to reflect the new bridge location. The key is HKEY_LOCAL_MACHINE\SOFTWARE\Javasoft\java Plug-in or change your CLASSPATH to include the new directory