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Have you ever tried putting everything in one test folder and testing it there?
What happened?

Ok. I guess I have no more ideas.

good luck.

What is in the simple html file you were using?
Were the html file and the jar files in the same folder? You shouldn't need a codebase= if they are together.

What was the error message when you removed the .class from the code= tag?

Ok, I'm glad you figured it out.

It is looking for a file named: IORLFCallApplet.class.class. The browser thinks the class name is class and that it is in the IORLFCallApplet package.
Remove the .class from the code= attribute

Did you try the simple html file to load the applet in a browser?

Can you make a simple test html file with an applet tag, put the jar in the same folder and load the html file in a browser? Try the code= tag vs class=
<applet code="IORLFCallApplet"...

If everything is there and in the correct folder: The class file should be at the top level not in a folder, Then why is java not finding the class?
You edited the error message you posted. Did you ...

Use a zip file utility to look inside of the jar file and see if the missing file is there and in the correct folder.