The first thing I would do is unload the ATP, close Excel, open Excel,
and reload the ATP. If this doesn't do it, close Excel. Go to the
Windows Start Menu and enter
"C:\Program Files\Microsoft Office\Office11\Excel.exe" /unregserver
The quotes are required. Your actual path to Excel.exe may be
different. Then, do this again but change "/unregserver" to
"/regserver".
Cordially,
Chip Pearson
Microsoft Most Valuable Professional
Excel Product Group, 1998 - 2009
Pearson Software Consulting, LLC
www.cpearson.com
(email on web site)