IE won't display my applets!

Hello,
I installed the Java SDK on my machine several months ago, and use TextPad to code Java Applets. Everything was working fine when I last checked, but i've recently come back to some of my old applets (havent coded any java for a few months), and when i run them either through TextPad or IE i get a blank white screen with "Applet Started" in the bottom left corner. When the applet is running (in textpad), if i go to the menu and choose restart, the applet will be displayed, but it won't allow me to enter any information into any of the text boxes. I believe I am using SDK 1.502 or something of the like. If anyone could shed any light it would be much appreciated.
Regards,
Ben.

The plot thickens....=)
I attempted to follow the instructions given in that
link, but when I opened up Java in control panel it
appeared as a blank grey box, with only the title
bar! Maybe i should upgrade my SDK?That is quite an possiblility, which version are you using? Another possibility is your instalation being corrupted for some reason. Are you able to run java applications? Maybe you just have to fix your instalation.

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<http://www.physci.org/codes/sscce.html>
Also, when posting code, using a little indent and [src][src] elements around it (where you would change 'src' to 'code' to show any text between the two as formatted source code) makes it a lot more readable as well.
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