glPointSize not working?!

I'm writing a simple polygon editor program for my class and I need to make the points on the polygons bigger than the lines so you can see them to grab them. So the idea was to draw the polygon first and then go back and draw points at it vertices big enough to see clearly. I was told that glPointSize was the way to make the points bigger but it doesn't seem to work. I've tried man different numbers and it always draws the points only one pixel big any idea why? It's working I just can't seem to get the points any bigger than one pixel. I checked GL_POINT_SIZE_RANGE and it returned 1 to around 63 and I'm just going for like 5 here.

    glBegin(GL_POINTS);
        glPointSize(10.0);
        glColor3f(0.0, 0.0, 1.0);
        for (i = 0; i < numVerts; i++) {
            glVertex3f(verts.x,verts.y,verts.z);
        }
    glEnd();