GUI button vanishes when I release mouse button

Hi all. I'm having some GUI button issues. I have a piece of code right now for when you select some objects a test question comes up, telling you to select a specific object. After you select that object I want a GUI button to pop up that says either correct or incorrect. For the most part I have it, only when I release the mouse button the GUI button disappears. I have tried different combos of GetMouseButton, GetMouseButtonDown, and GetMouseButtonUp. But when I use GetMouseButtonDown in place of GetMouseButton the GUI button doesn't even show up at all. My code follows:

if(allObjectsClicked)
    {
        if(isClicked == false)
        {
            GUI.Box (new Rect (350,10,350,120), "Please click the learning cube.");
            {
                if (Input.GetMouseButton(1))
                {
                    if (Physics.Raycast (ray, out hit))
                    {
                        if(hit.collider.gameObject.name == "learningCube2" || hit.collider.gameObject.name == "learningCylinder2")
                        {
                            isClicked = true;
                        }
                    }
                }
            }
        }

        if(isClicked)
        {
            if (Input.GetMouseButton(1))
            {
                if (Physics.Raycast (ray, out hit))
                {
                    if(hit.collider.gameObject.name == "learningCube2")
                    {
                        if(GUI.Button(new Rect (350, 10, 350, 120), "That was correct. You may now continue."))
                        {
                            navButtonEnabled = true;
                            Debug.Log("Why isn't the GUI button staying, jerk?");
                        }
                    }

                    else
                    {
                        GUI.Box(new Rect (350, 10, 350, 120), "Sorry, the correct answer was the cube. Click to advance.");
                        Debug.Log("Why isn't the GUI box staying part II");
                        navButtonEnabled = true;
                    }
                }
            }
        }
    }

if (Input.GetMouseButton(1)) is true only while the mouse button is held down. As soon as you release it, those buttons won't be 'called' to draw themselves. I think maybe if you just remove that from after the isClicked test it might behave for you