adobe air windows/C++:Error #3500: The extension context does not have a method with the name

I created a C++ dynamic dll called by air.

If the dll depends on other dlls, then the error#3500 occured. However removed other dlls, it works.

Could that mean the air can only call one dynamic dll that doesn't depend any other dlls?

does anybody met this problem before, or let me know what can I do?