It won't start up when using the latest java version in tiger which is Java 2 Platform Standard Edition (J2SE) 5.0 Release 1, but it will work with java version 1.4.2_09.

How to fix:
If you are using java J2SE 5.0 you have to switch over to the older version of java by opening your applications folder & then going to the utilities folder and the java folder, then J2SE 5.0 folder. After that doubleclick on (Java Preferences) to change which java version you want to use.