[flexcoders]Where is the right property?

[dorkie dork from dorktown]

I am trying to constrain my component 10 pixels from the right edge in
ActionScript and mxml editor is telling me there is no "right" property.

This code throws the following error:

myLabel.right = 10;
myImage.right = 10;

1119: Access of possibly undefined property right through a reference with
static type mx.controls:Image.
1119: Access of possibly undefined property right through a reference with
static type mx.controls:Label.

i am clueless why there is no right property in AS3 when there is clearly a
right property in MXML.