Kieran,
Here is a simple test page to determine if you have a JVM installed, and setup properly.
Goto: http://www.bodo.com/javame.htm
If you see the scrolling text in the Applet window, then you have Java properly installed.
if you don't then you need to turn this on. This is all done in your Internet Options.
In Internet Explorer, go to the Tools Menu, select Internet Options... and then select the Advanced Tab. Make sure that you have the Java VM check box checked.
thanks
Charles
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Charles Gallant