I need some help on this: All of a sudden, i am unable to open a particular XLS file on our server using Excel 2010. The file opens ok, i can see the contents of it in excel, but i instantly get a message box stating "You cannot open this file directly". The only option i have is to hit OK and it closes the workbook i was opening. The 03' excel users here can open it and edit it just fine. Copying the file to my desktop does not fix the issue as well.

I did some Google searching and found (3) things to try but none of them fixed the issue. Here is what I have tried:

(1) Tools|Options|General|Ignore other applications (uncheck it)
(2) Close Excel, Windows Start Button|Run "excel /unregserver" | then | Windows Start Button|Run "excel /regserver"
(3) Microsoft KB 2123563 fix - http://support.microsoft.com/kb/2123563

What else can i try?