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OpenGL [OpenGL] problem with antialiasing

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Hi, I have a problem with antialiasing under Vista, It doesn't work. I've tried to google it and search for related topics here but I was unsuccessfull. I'm using GL_POLYGON_SMOOTH. Here is extract from my code:
BOOL DisplayScene()
{
   //drawing triangle
   glBegin(GL_TRIANGLES);
        glVertex3f( 0.0, 0.0, -1.0 );
        glVertex3f( 1.0, 0.0, -1.0 );
        glVertex3f( 0.5, 1.0, -1.0 );
   glEnd();
}

//somewhere else.. Turning on ('O') and off ('F') antialiasing
switch(message)
{
case WM_KEYDOWN:
   if(wParam == 'O') 
   {
	glEnable( GL_BLEND );
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glEnable(GL_POLYGON_SMOOTH); 
	glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);
   }
   if(wParam == 'F') 
   {
        glDisable( GL_BLEND );
	glDisable(GL_POLYGON_SMOOTH);
   }
}

Here is my pixelformatdescriptor structure:
static PIXEsizeof(PIXELFORMATDESCRIPTOR) pfd = { sizeof(PIXELFORMATDESCRIPTOR), //WORD nSize PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER, //DWORD dwFlags; PFD_TYPE_RGBA, //BYTE iPixelType; 32, //BYTE cColorBits; 0 //BYTE cRedBits; 0, //BYTE cRedShift; 0, //BYTE cGreenBits; 0, //BYTE cGreenShift; 0, //BYTE cBlueBits; 0, //BYTE cBlueShift; 16, //BYTE cAlphaBits; 0, //BYTE cAlphaShift; 0, //BYTE cAccumBits; 0, //BYTE cAccumRedBits; 0, //BYTE cAccumGreenBits; 0, //BYTE cAccumBlueBits; 0, //BYTE cAccumAlphaBits; 16, //BYTE cDepthBits; 0, //BYTE cStencilBits; 0, //BYTE cAuxBuffers; PFD_MAIN_PLANE, //BYTE iLayerType; 0, //BYTE bReserved; 0, //DWORD dwLayerMask; 0, //DWORD dwVisibleMask; 0 //DWORD dwDamageMask; } Antialiasing points and lines works well, while antialiasing polygons doesn't work at all. Can somebody help me? P.S. Sorry for bad english ; p

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