Valuation Area Problem

Hello All,

I have a new system to be configured and the requirement is that the valuation area to be set up at Company code Level. But in the system the Valuation level is already defined at "Plant Level". I have not done any configuration yet. First thing is that I want to change the valuation area to "Company code level". I am unable to do that by SPRO. Can some one help me how to set is to "Plant Level". I am aware once this setting is done it cannot be changed.

Thanks

SS