GUI Label Size and Position Changes With Resolution

Hey all,

I'm having this very frustrating problem with my HUD GUI interface. I would like to display and textured label in a portion of the screen. The problem is that the position and size get all wonky when I change the screen size/resolution.

Here is my very simple code:

Code (JavaScript):

1. #pragma strict
2.  
3. var missileSymbol : Texture2D;
4.  
5. function OnGUI()
6. {
7. var symbolWidth : float = Screen.width / 10;
8. var symbolHeight : float = Screen.width / 10;
9.  
10. var xPos : float = Screen.width / 2;
11. var yPos : float = Screen.height / 2;
12.  
13. GUI.Label (Rect(xPos, yPos, symbolWidth, symbolHeight), missileSymbol);
14. }

How can I solve this problem with code?

Thanks!