RightToLeft Tab Disappeared !!!

Hi All

I am a new member in this site. I have a problem with Excel.
I use from w2k (SP4) and Office 2000 (SP3). I instal Office with administrator account.
When my instalantion completed and I give computer to my user, I see that my user (with herself account) can not change righttoleft property of worksheet.
Right-To-Left Tab disappeared from opton menu. But when I logon with administrator account, all thing is right.

everybody can help me?

Hi All
Everybody can help me ?