Enable Steam Overlay?

[Swifty]

Just installed and never played before...The first start screen "Click here to register" so, I click to register..."Error you must have Steam overlay enabled to register" So, come out of game right click on AL icon in Library, I see Steam overlay check box is unchecked but is also greyed out, so I can't enable Steam overlay? Can anyone help me with this?
Thank you!
Steve

[egs]

You may have disabled it globally in the Steam settings.

[Swifty]

Yep that did it Thank you :)