If you can tell us what URL this was from, we can take a look at the script and maybe see.
The basic error though appears to say that whatever server the script was (attempting to) communicate with was down, or network problems were in the way.
Have you retried the webpage since that time? Did you get the error again?
Also, if you ARE using IE (which that appears to be an IE error), be sure you have downloaded the most recent version of IE (and its patches!). Scripting errors are frequently seen in IE5 these days because twits code their pages for IE6, and so forth.
Hope this helps!