Creating a new table in iWork numbers on a specific sheet using applescript

Question

I am having trouble creating a new table on a specific sheet using Applescript unless the sheet I want insert the new table in is either new or current selected. The general form of the code I am using is:

    tell application "Numbers"
    tell document 1
    tell sheet "This is the sheet I want to use"
    make new table with properties {name:"A new table"}
    end tell 
    end tell 
    end tell

Has anyone had any more success at achieving this? This looks to me like a bit of a problem for some advanced spreadsheet scripts in Numbers.