Why guiTexture's mouse event doesn't work?

There are two guiTextures in my scene,the larger one is behind the smaller one,
and I add a script to the “smaller”,but the OnMouseOver() function doesn’t work when
the mouse over the “smaller”,and when I move the larger one a bit far from “smaller”,it works!!
so How to fix the problem,Thanks…
here’s two image to show my problem:

http://i.min.us/ieaLoc.jpg
http://i.min.us/ieffKq.jpg

That’s probably because they are both at the same Z co-ordinate.

Select your large GUITexture, set it’s Z position property to -1 in the inspector and your OnMouseOver function should now work on the small one.

hey frns i have one problem with gui texture images which i have used as a button,currently the problem is that when i use mousedown event on gui textures,it fails to detect gui textures…plz help me if u can…

vipin

hey can anyone plz give me code for mousedown event on gui texture(i meant how could i detect gui texture images on mouse click)