Importing excel worksheets into toolbox

Hi,

I have been trying to import my excel worksheet into the 2012 solidworks toolbox, but have had no success. i am able to export the the toolbox into excel but when i save it and try to import back into the toolbox, nothing changes!? i have tryed changing the extension of the excel worksheet (.xlsx to .xls) but no luck, not sure why this isn't working any help would be appreciated.

thank you

SolidworksImport export