dees <AHEM> nuts:
Try selecting the ~entire~ affected area, not just that column. Try this:
* Select entire area to be sorted
* Go to the 'Data' drop down menu
* Select 'Sort'
* Fill in the rest
As a tip, there is a selection button in this control that allows for you to use a header row (which will bring your header names into the drop-down menu).
See if this does what you're looking for.
~Thomas