Thread Problem. "Hook"

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C++

MFC

Hello,

Once again, I have problem.

I created an DLL that sets few hooks into target application. But I have problem with one function. Let's call it ParseData.
I hooked this function and any data coming through are displayed in ListCtrl.
I have 3 classes that actually calls this function.
The first master class passes address of the ParseData to 2 remaining classes.
Like:

...
*(DWORD*)&ParseData = m_pParseDataAddress; // Set the function call for MasterClass 
m_SomeDlg->SetParseDataFunction(m_pParseDataAddress); // Pass the addr to class 2
m_Para.SetParseDataFunction(m_pParseDataAddress); // Pass the addr to class 3
...

When m_SomeDlg calls ParseData, it goes though hook and data are displayed in ListCtrl.

m_Para however creates new thread at some point via command:

...
// IN COMMAND HANDLER
	if( strcmp(chCommand, "Load") == 0)
	{
		Init();
		m_bActivated = true;
		_beginthread((void (__cdecl *)(void *))&ProcThreadAddr, 0, (void*)this);
	}
...

void __cdecl CPara::ProcThreadAddr(CPara * ParaPtr)
{
	ParaPtr->MainThread();
	_endthread();
}

In MainThread there is a while loop which checks if m_bActivated = true.
However any calls to ParseData from this thread aren't displayed in hook (Data is parsed however)

When I call ParseData from any place, data is displayed in hook, but when I call it from MainThread it doesn't display anything.

That's actually pretty strange for me.

Thank you for your help.