I'm having a very basic issue and cannot for the life of me figure out what the problem is. I am trying to display a dynamic map service hosted locally in the Flex Sample Viewer. I have followed the correct protocol (adjusting extents and pasting the service url from my rest services page into config.xml, using a spatial reference of 4326 for the service). There are no errors in the code that I can see. When I run the application from Flex Builder, it loads the two standard basemaps from ESRI listed in config.xml at the extent I specified. However, when I click on live maps, it lists my service with a check box next to it, but when I check it on and off, nothing happens. I also do not see the arrow next to the service name that you can usually expand to see the layers in the service. I have tested the service itself (ie. viewing it in JavaScript from the service's rest page), and there seems to be no problem with it. My guess is that there's something going on in the Flex Project (which is unmodified outside of the aforementioned edits to config.xml) causing the problems...has anyone else experienced similar issues? Any help or ideas would be greatly appreciated. Thank you in advance!