[CentOS] "invest" applet in centos 5.1 seems to be inoperative

Hello!

I figured it'd be interesting to see a miniature graph of the Dow Jones 
on my panel bar.  Unfortunately, it doesn't appear to do anything, and 
the preferences for it isn't helpful (it already has DJIA).

So, any suggestions on how to get it to work?

Regards,
Charles Campbell