VBO problem

Hi guys!! i have a problem using the ARB vertex object , is a newby error , the problem is that , i have a square formed by 12 vertex and i try to render this square using 2 triangles , y don't try to use face index, only the vertex list.. well the problem is , when i render it only saw a single triangle, but a give the data for a square(formed by 2 trianges) , i think i have a stupid mistake and i can see it , any one can help? here is my code

//all my square points......
float SquarePoints[] = {
   5.5f, -1.5f, 0.0f, -1.5f, 1.5f, 1.0f,
   -1.5f, 1.5f, 0.0f, 1.5f, 1.5f,  0.0f
};

all the buffer initialization ....

	// Generate And Bind The VB
	glGenBuffersARB( 1, &squareBufferID );							// Get A Valid Name
	glBindBufferARB( GL_ARRAY_BUFFER_ARB, squareBufferID );
      glBufferDataARB( GL_ARRAY_BUFFER_ARB, 12*sizeof(float), SquarePoints,DRAW_ARB );

   
   // done,  unbind everything!
   glBindBufferARB(GL_ARRAY_BUFFER_ARB, NULL);
   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, NULL);

and them draw it!!

	glBindBufferARB( GL_ARRAY_BUFFER_ARB, squareBufferID );
	glVertexPointer(3, GL_FLOAT, 0,0);
	glEnableClientState( GL_VERTEX_ARRAY );
	glDrawArrays( GL_TRIANGLES, 0, 4);	// Draw 

	glDisableClientState( GL_VERTEX_ARRAY );