Try the usual fix(es) for this problem.

ToolsOptionsGeneral uncheck "Ignore other Applications"
Exit Excel and try again

If this doesn't work try to re-register Excel

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"(no quotes)OK.


Gord Dibben MS Excel MVP


On Mon, 27 Nov 2006 13:14:01 -0800, zaybexx
wrote:

When I click on an .xls file in explorer it asks for my authentication code -
then, it doesn't recognize my auth. code. I can still open the Excel program
File open and then click on the file and it works. Why can't I open in
Explorer (I used to be able to).

Gord Dibben MS Excel MVP