Suddenly Save and Save as greyed out in Excel 2003
 

I use a networked pc and laptop. My Save and Save As applications on the
Excel 2003 toolbar have suddently become greyed out. Other users of shared
spreadsheets do not have this problem. I do not have the problem with any
other Office products. I can use Ctrl "S" or "Close" to get around the
problem but this does not help with new workbooks where I need to select the
correct location in which to save the file. Any suggestions for a quick fix?