Anything else happening.
I would try opening without macros,  it that doesn't work try opening
in safe mode.    Hope your file is not on removable media.

I f that helps  then you possibly have an   Auto_Open macro or
a Workbook  Event macro in ThisWorkBook that is doing you in.

Did you recently start using a new addin,  you might want to
start up in Safe Mode
  http://www.mvps.org/dmcritchie/excel/event.htm#addins
also see topics  #reg   and  #startup
---
HTH,
David McRitchie, Microsoft MVP - Excel    [site changed  Nov. 2001]
My Excel Pages:  http://www.mvps.org/dmcritchie/excel/excel.htm
Search Page:        http://www.mvps.org/dmcritchie/excel/search.htm