Problems about GUI fontsize

I declared 2 GUIstyles in one script, like this:

var TextStyle1 = new GUIStyle(); var TextStyle2 = new GUIStyle();

In the inspect I set the fontsize of "TextStyle1" to be 40, and, the fontsize of "TextStyle2" to be 30, Now here is the question: If i just run it in unity, the different fontsizes were set correctly, but if i "build and run" it on an andriod pad, the text showed on the pad screen were the same small, just like I didn't set it before.

Can anyone tell me what happened??? Thanks!