lockCursor problem

Hey, I am using the “lockCursor” script found here:
http://unity3d.com/Documentation/ScriptReference/Screen-lockCursor.html
am though I am using it as is I am getting this warning:
"‘lockCursor’ is not a member of ‘UnityEngine.Screen’.
What’s up with that?

Are you using Unity 1.6.1? The feature was only added in that version.

Oooh. A new version. Thanks for bringing me into the light on that!