Compatibility Checker-excel
 

I have Microsoft Office Home and Student 2007 recently installed. Previous
Excel work sheet was 2003. After entering data in the Excel work sheet the
Compatibility Checker box popped up when I clicked to save the information.
While trying to understand what what the Compatibility Checker was saying I
clicked on the 'Copy to New Sheet' button.
Now when I try to open the work sheet I only get the copy of the
Compatibility Checker. It shows the work sheet is in [Compatibility Mode]

My question is: How do I get out of this compatibility mode and back to my
data in the excel work sheet without loosing my data?