Unable to resolve resource bundle "en" for locale "en_US"

I am trying to compile SparkWeb using Flex Builder 3 in Windows and have worked through 270 compile errors and I am down to just one. I am getting an error of “Unable to resolve resource bundle “en” for locale “en_US””, does anyone know how to resolve it?

Thanks

I figured it out after a lot of searching. I was able to get it to compile successfully by adding “-sp c:\dev\SparkWeb\SparkWebCore\locale” to the “Additional compiler arguments:” option under Properties / Flex Compiler. Be sure to use the path of your locale folder that contains en.properties.