Excel 2007 not open my files!

[ganhaoh]

Hi,
Some days ago I make some excel 2007 files an sended by mail to another work college.
Now I can't open this my files in excel 2007, the excel window open blank, without my file or a blank file.
My college can open the files without any problem, but if he send me the files happend the same.
The curious that I can open other files from other folders.
Thanks for any help.

[ganhaoh]

Another curious thing: I can see the file in print preview or in fullscreen.
I can't only see the file in normal mode.

Please, any help? Thanks

[Huge]

Did you happen to hide your workbook? Check the view tab and make sure it is not hidden. Wild guess there.