I builded a module containing the component of Map, flash builder 4.6 and skd 4.6 were used, the module could not be loaded by the main program,the error was "VerifyError: Error #1014: can't find the class of mx.rpc::AsyncToken".But if i chose the SDK 4.0,the program will be run successfully. Is there anyone here that could possibly help me to handle this problem?