Identify Widget configuration issue

I am attempting to configure your widget using the GUI and running to an issue early on. When I enter the service URL, include the layer id, enter the layer name and select browse it just keeps browsing and does not find the service. The service URL is copied and pasted from Server. The versions of Flex and widget are the same.

All of the data layers are located on the web server and no proxy server appears to be necessary.

Thanks
Newbie