Where exactly?  I visited that URL then followed a few
links but did not see any applet.  Copy/paste the URL
of one such applet page.

TooManyScaryBunniesError?  That's serious.

Something else perhaps?  Maybe you could expand,
and be more specific.
<http://www.physci.org/codes/javafaq.jsp#exact>

Probably not without an exact URL and more detail
on that 'error'.  Though you might check further/report
it here <http://www.mozilla.org/support/firefox/bugs>.

As an aside, from
<http://www.oneglobe.com/language/chi003/index.php>
"Use Internet Explorer, allow Popups for oneglobe.com"

'Use Internet Explorer, ..'

Get stuffed.

' allow Popups for oneglobe.com'

You must be kidding!  Fix your broken-a.s web site.

The key to the mystery is what error? Have you a stack trace or error
massage?

You did not mention signing. Such an Applet should be signed because
of the potential for spying.

I found the app. It would not let me use my name, Roedy, saying it was
in use.  I typed that I wanted to practice English with the computer.
It asked me to say something and it gave a word-for-word translation
into Spanish.I saw no error mentioning jpinscp.dll

Presumably I won't see that as the client. This a server side problem,
right?

I don't even know what I am supposed to type to trigger the error.