You have the right default(5) set. Maybe, try 4 and if it doesn't work I would switch it back to 5.
You can also open your azureus script located in your azureus directory and manually change the location that it should look for java.
change the "/usr/java" to what is reflected in your file system. Something like "/usr/lib/j2re1.5-sun" or "/usr/lib".