Clr Dll loaded by test prog but not by calling app

I have developed a dll (C++/Cli) that interops with C#. This dll is one of the three dlls needed: this dll (A) calls a wrapper dll (Native/Managed, in C++/Cli) (B) to interop with a C# dll (C).

A is supposed to be loaded by a calling program (EXE) when deployed.

In testing, a message from the C# dll is displayed, which tells me dll A is correctly loaded by a C++ tester and subsequently has made successful call to other dlls.

In deployment, dll A is loaded by EXE if it only displays a message. However, when lines of code to call dll B are added, EXE no longer recognizes dll A.

I think the problem lies in these extra lines of interop code to call dll B. Any idea as to where I should look for problem?

Here is the exported function in dll A:

int WINAPI Init()
{
    FILE * pConsole;
    AllocConsole();
    freopen_s(&pConsole, "CONOUT$", "wb", stdout);
    printf("Started\n");

    //These two line below call the wrapper dll B
    // which serves as a middle man between dlls A and C
    NativeExport_ClientWrapper* client = createMyClass();
    if (client) client->Test();

    return 1;
}  

Here is the unmanaged side of the wrapper B:

//----------------------------------------------
//NativeExport_ClientWrapper.h
//----------------------------------------------
//#pragma once

#pragma once
#pragma unmanaged

#define THISDLL_EXPORTS
#ifdef THISDLL_EXPORTS
#define THISDLL_API __declspec(dllexport)
#else
#define THISDLL_API __declspec(dllimport)
#endif


class ILBridge_ClientWrapper;
class NativeExport_ClientWrapper {
private:
    ILBridge_ClientWrapper* __bridge;
public:
    NativeExport_ClientWrapper();
public:
    ~NativeExport_ClientWrapper();
public:
    THISDLL_API void Test();

};
extern "C" THISDLL_API  NativeExport_ClientWrapper* createMyClass();

And here is the managed side of the wrapper:

//----------------------------------------------
//ILBridge_ClientWrapper.h
//----------------------------------------------
#pragma once
#pragma managed
#include <vcclr.h>

class ILBridge_ClientWrapper {
private:
    gcroot<Client^> __Impl;
public:
    ILBridge_ClientWrapper() {
        __Impl = gcnew Client;
    }
    void Test() {
        __Impl->test();

    }

};