Help with thread............

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hello everybody, please i need your help,
I try to work with thread in c++ , in easiest application work Ok but in
application with thread the class doesn't ....the application show an
critical error that said
"has been a critical error and must be shoutdown ".
the code is:
DWORD WINAPI Controller::Exe cuteThread(PVOI D data)
{
Controller* pt = (Controller*)da ta;
pt->objNavigator = Navigator(pt->currentInstitu tion, pt->currentMode,
pt->visibility, pt->Timeout);
pt->objNavigator.E xecute();
Sleep(1000);
return 0;
}
void Controller::Loa dNavigators(int Mode, int user)
{
HANDLE thread_handle; // this is the handle to the thread
DWORD thread_id;
for(int i=0; i<Controller::_ Institutions.si ze(); i++)
{
Controller::cur rentInstitution = Controller::_In stitutions[i];
Controller::cur rentMode = Mode;
thread_handle = CreateThread(NU LL, 0,&Controller:: ExecuteThread ,this, 0,
&thread_id); // HERE ERROR
Controller::put Results(Control ler::objNavigat or.GetResults() );
Controller::_Se rvicesToExecute = _ServicesToExec ute +
Controller::_In stitutions[i].getCountServic es();
}
}

Please hellppppppppp me
:O(