I have come across this many times and I am sure will have more times in the future. As a ColdFusion developer for many years, I have not had to worry about case sensitive code since my Java days. However, ActionScript and Flex are very case sensitive, so make sure that when you type one variable one way, that you type it exactly the same the next time you use it.

This also goes for using any of the RemoteObject destionations as defined in the services-config.xml file. If the destination is ColdFusion (note the capital F) then the destination attribute in your RemoteObject tag needs to be ColdFusion as well.