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May 07, 2012 03:32 PM|LINK
Have you looked at Firebug or Chrome Developer to see what/where the error is occuring? Just glancing at the code, it seems like your url could be the cause and I suspect that if you look at firebug you will see a Server error.
Usually with the url you are using a webservice of some sorts, so you would have something like
If you can look at firebug and post the error it would help in figuring out what is going wrong.