C / C++ / MFC

Hello together, 

I´m try to get a communication between a process written in c++ and a process written in c#.
Each Processes have a RPC Server ans a RPC Client.

The following situation exists:
It´s possibel to start a correct RPC communication between 2 processen written in C++.
And it´s also possible to start a correctly RPC communication between 2 processes written in C#.

It´s not possible to start a correctly RPC communication between a process written in c++ and a process written in c#.

The interface is initialized with the "ncacn_ip_tcp" protocol.

The error accours in the function "NdrGetBuffer(,,)". This function is declared in "rpcndr.h".
The client use this function for getting a pointer from the RPC server to send the requiered datas. 

I don´t no how shall I do now.
Is there anyting to setup in user settings?

Can someone help me?
Have someone also problems with RPC Server / Clients


Thank You very much.
CopWorker

int main()
{
    CTest test;
    test.ListItems();
}

CTest::ListItems()
{
    CString s(_T("abc"));
    std::out << s;
}

01378168