PS/2 Mouse

im just beginner, and im trying to make a PS/2 mouseInterface; my problem 
now is this
int EnabledDataReporting()
	{
          DiseableKeyBoard();
          do
          {
          WriteMouse();
          asm("outb %%al,$0x60;": :"a"(EnabledDataReport));
          }while(!IsCommandAcepted());
    /*      asm("outb %%al,$0x60;"::"a"(0xf4));//forzar datareporting*/
          EnabledKeyBoard();
          return TRUE;
       };
as you see i most to demand with the line between /* */, if i dont include 
this line , my mouse just stop  to sending signals(or what ever it sends :D  
) EnabledDataReport is 0xf4 but when i include the line 9
everything does fine,so my question is what i making wrong??? why if i put 
0xf4 instead ENabledDAtaReport it work.

Take Folks

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