Try the usual fix for this.

ToolsOptionsGeneral Uncheck "Ignore Other Applications etc."

In 2007 that would be ButtonExcel OptionsAdvancedGeneral

If no joy with that................

Close Excel first and On the Windows Taskbar

1) StartRun "excel.exe /unregserver"(no quotes)OK.
2) StartRun "excel.exe /regserver"(no quotes)OK.

See the space between exe and /regserver

You might have to designate a full path to excel.exe.

In that case StartRun "C:\yourpath\excel.exe" /regserver(quotes
required)OK.


Gord Dibben MS Excel MVP

On Tue, 22 Sep 2009 07:41:02 -0700, Joe Z <Joe
wrote:

Whenever I double-click on an Excel file to open it, The Excel program opens
again in a new session rather than just opening the file in the current
session.