I had installed Windows Xp along with Microsoft Office 2003 on my system. Recently i had purchased Office 2007 and had installed it on my pc. Now, the problem is that when i try to open Excel 2007 on my system, i can't see the control tab on my excel sheet. It seems to be missing from my excel sheet. Can any body tell me that how do i restore the control tab back on my system? Can any body provide me the correct solution for the above issue? Any kind of help on the above issue would be appreciated.