script compilation error when coding PlayerSettings

I wanted to set some PlayerSettings default values from code. the script doesn't give me any errors in editor, however, when I try to build standalone, I get compile errors... can anyone help?

 

O... I built without those lines and those values seem like changed as I wanted anyway... So I don't need that part of the script any more... However, I'm still interested, what was wrong.

 

it was something like this(this is not the full script... I was actually changing something and didn't know, the default values were automatically changed):

Code (JavaScript):

1. function Start()
2. {
3. PlayerSettings.defaultIsFullScreen=Screen.fullScreen;
4. }

this gives following error(only when I try to build):

PS : If at any chance you need the full code, just tell and I'll post it....

 

Thanks for help. I'll keep that in mind, in case I need that another time.