Hello, I'm the author of that plugin.
The page you linked to doesn't work. It gives a custom 404 error page. Probably because you gave the wrong link:
(You had an extra "lm" at the end of the url.)
By the looks of it, you have not told the example php web page the correct IP address to connect to WebJockey on.
However, if you're running your station on a remote web server then WebJockey will not be ideal for you because there are security issues at play with the communication between the webpage script and the WebJockey plugin (i.e. there is none.) WebJockey is not for remote hosts. It's only for hosts who's Winamp+DSP source is running on the same computer or the same local area network as the station's website is on.