CALLBACK not executed by SetTimer - c++

Question

Well I have made my proxydll for d3d9, the dll itself works and I can confirm it loads into the process because a yellow rectangle is created.
The problem is that I call SetTimer but my callback isn't called, what to do?
I can hear the two MessageBeep sounds but then none and my money in game stays 0.
this is my code:
// global variables
#pragma data_seg (".d3d9_shared")
myIDirect3DDevice9* gl_pmyIDirect3DDevice9;
myIDirect3D9* gl_pmyIDirect3D9;
HINSTANCE gl_hOriginalDll;
HINSTANCE gl_hThisInstance;
#pragma data_seg ()
UINT TimmerID = 0;
#define ProcessTickID (1337)
VOID CALLBACK ProcessTickMain(HWND x, UINT y, UINT_PTR z, DWORD w);
BOOL APIENTRY DllMain( HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
// to avoid compiler lvl4 warnings
LPVOID lpDummy = lpReserved;
lpDummy = NULL;
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH: InitInstance(hModule); break;
case DLL_PROCESS_DETACH: ExitInstance(); break;
case DLL_THREAD_ATTACH: break;
case DLL_THREAD_DETACH: break;
}
return TRUE;
}
void InitInstance(HANDLE hModule)
{
OutputDebugString("PROXYDLL: InitInstance called.\r\n");
// Initialisation
gl_hOriginalDll = NULL;
gl_hThisInstance = NULL;
gl_pmyIDirect3D9 = NULL;
gl_pmyIDirect3DDevice9 = NULL;
// Storing Instance handle into global var
gl_hThisInstance = (HINSTANCE) hModule;
MessageBeep(0xFFFFFFFF);
//TimmerID = SetTimer((HWND)Address::Game::MainWindowHandle,ProcessTickID,5,ProcessTickMain);
TimmerID = SetTimer((HWND)gl_hThisInstance,ProcessTickID,5,ProcessTickMain);
MessageBeep(0xFFFFFFFF);
}
VOID CALLBACK ProcessTickMain(HWND x, UINT y, UINT_PTR z, DWORD w)
{
int * ptr = (int*)Address::Ped::Money;
ptr += 1;
MessageBeep(0xFFFFFFFF);
}
void ExitInstance()
{
KillTimer((HWND)gl_hThisInstance,ProcessTickID);
OutputDebugString("PROXYDLL: ExitInstance called.\r\n");
// Release the system's d3d9.dll
if (gl_hOriginalDll)
{
::FreeLibrary(gl_hOriginalDll);
gl_hOriginalDll = NULL;
}
}