Problems Saving on a shared drive
 

Hi all,
I have an Excel workbook which I have created at home.
I have brought this workbook into the 'office' and want to transfer the
workbook onto a PC here. There is no problem in doing this, the problem
occurs when I save any updates to the workbook.
Whenever another 'user' logs onto the PC , none of the changes are shown or
if I log onto another PC in the same office and display the workbook on the
shared drive (S) no changes are shown.
I am very confused as to why this happens.
It seems like all the other users have the same access rights as I have to
view/change the worksheet but I can't get the worksheet to display any
changes made???
Can anybody help??
thanks in advance