great trouble in using python binding(vlc.py)

[chenmyzju]

I've Met great trouble in using python bindings(vlc.py). I've successfully applied in VLC which is download from official websites.
But we know the external API of official is limited and can't satisfy our personal requirements. So we've made a secondary development over it and a few external APIs are added to satisfy our requirement(The VLC is based on ffmpeg).
So we've got all the dlls after compiling the project. And we try to vlc.py to load the dlls and use the APIs within the dlls. The dlls are input in the C:\program \VideoLAN\VLC and information shows they are successfully loaded, but when I use to API (libvlc_new(agrc,args)) to creat a instance. But whatever the parameter I passed, the function always return None.
However, the Visual Studio project can successfully using the dlls to make the exe run(The parameters I give are the same in VS and python).
So I really don't what the problem is.
I really look forward to your idea and suggestion
Thank You very much