Check your external_variables.txt they are obviously not linked to the correct URL or your configuration is wrong make sure its external_variables.txt at the end and also in notepad do ctrl+h and replace the URL to localhost or your own URL.
Do what HabFun said, Open external_variables in your SWF folder. Look at the URLS that are in it, it might say something like URL or %predefined%. Change all of those to your url or IP. Should work.