After a server move my telecoms site is coming up with errors - in Firefox the browser will just freeze up, but in Internet Explorer I sometimes get the following strange error:

Cannot load dialogue
Error 623: The system could not find the phone book entry for this connection
I did a search on the error message and it claims to be an issue with my PC, but I've followed the instructions as directed, and not only do I still get the error, but so do other people.

An example page for this is:
http://www.pmctelecom.co.uk/shop/JPLBINNAMP.html

Can anyone please take a look and suggest what may be causing it? The server move was stressful enough but now to see this come up is causing further headaches.