Mutex Locking only after the 3erd entrance?

[Alphadan]

Hi

i have a mutex declared and initialized on a CPP

HANDLE RqMutex;

int main(){
     RqMutex=CreateMutex(NULL,FALSE,"LegRefMTI"); 
}

Then from another cpp on another thread

I refer to my mutex as:

extern HANDLE RqMutex;

then on the procedure i want to lock

I call:

	    for (RqIt =  RqLst.begin(); RqIt != RqLst.end(); ++RqIt){ //Loop iterating the args to be passed
		   HANDLE hThread;
		   hThread=(HANDLE)_beginthreadex(NULL,0,(unsigned int (__stdcall *)(void *))StartRequest,(void*)RqIt->c_str(),0,NULL); //Starting thread
		    if (WaitForSingleObject(RqMutex, 60000) == WAIT_TIMEOUT){
                      //Times out after 1 minute of waiting
		    }
                     //here should only enter once (if i dont release the mutex)
	   }

inside of the thread started after i make the copy of my args passed to the thread by reference...

only after i have the copy of the args( (void*)RqIt->c_str() ) on the other thread (on stack) then I release the mutex.

but there is a problem i commented the relese mutex and the beginthread starts 3 threads after locking.

i should only start one since i never released the mutex since i commented the release mutex the mutex isnt being released on another thread or cpp either.

does anyone knows whats wrong??

Thx in advance.