Importing open source jar files

Hi
I have written a program, a Java application (Prog 1), which uses some opensource jar files and it runs fine.
Now I am trying to create an applet (another program in same project) which will show the output from Prog 1 on a webpage.
But when I try to do this, the applet does not get loaded into the browser and shows me the (ClassNotFound) error that a class file which is in the open source jar file cannot be found.
why is this happening and what can be done?
Please help.

... and what JAR is the class in, which it reportsas
The jar file is htmlparser.jar, but this file is
already added in the project classpath
No it isn't. The run-time "classpath" is specified by what you put in the <applet> tag. It has nothing to do with the classpath you specified at compile-time. You need to add htmlparser.jar to the "archive" entity.
archive="YahooExt.jar,htmlparser.jar"
(if I have the correct separator, which I believe is a comma, according to this resource: http://java.sun.com/j2se/1.4.2/docs/guide/misc/applet.html)
And of course htmlparser.jar needs to live on the web server, in the same directory as YahooExt.jar in the example above.

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Importing open source jar files

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