I've embedded an Excel spreadsheet with a few simple calculations in a Word document. Initially, whenever I double clicked the embedded spreadsheet the Word ribbon at the top of the document would change to the Excel ribbon and allow me to edit the embedded spreadsheet with native Excel command options. Now, when I double click the embedded spreadsheet, the Word ribbon disappears and two pull down menus appear in its place (the File and Window menus). Nothing else. Also, I've noticed that when I right click in one of the spreadsheet cells, all of the options are grayed out Essentially, I can't do any editing whatsoever in my embedded spreadsheet, and it's crippling me.

Any ideas?