ITunes Windows SDK IITUserPlaylist::AddFile access violation

Question

Hello. I am just try to write simple program for some practice. But iTunes COM for Windows SDK threw me a little surprise.
I am want to create playlist and add file to it but when i call IITUserPlaylist::AddFile program crash with access violation. I can all other methods like Delete etc.
Project (MSVC10): http://www76.zippyshare.com/v/34795637/file.html
Main.cpp: http://pastebin.com/iMYbXwez
If i call IITLibraryPlaylist::AddFile all was right.
Just uncomment 95 or 96 line for test.
Simple C# code works fine:
iTunesApp itunes = new iTunesLib.iTunesApp();
IITUserPlaylist playlist = itunes.CreatePlaylist("C# playlist") as IITUserPlaylist;
IITOperationStatus status = playlist.AddFile("C:\\test.mp3");
Help me please

Answer 1

I use vbScript for writing iTunes scripts, and I'm really not familiar with C#, but I think you're sending two arguments into the function when only one is required.
As a guess either of these would work:
mainLibrary->AddFile(filePath);
&status=mainLibrary->AddFile(filePath);
Depending on whether or not you are going to check the status code to see if the call was successful.
tt2