Graphs disappear

Hi !

I have a problem with Excel 2007:

In one file, I have different graphs that I copy/paste to a second Excel file (with different sheets).
The first time I did that, everything was ok, I had my graphs. But for another data, when I save my second file and open it again, all my graphs have disappeared !
I only have an axis scale of 0 and sometimes, some graphs appeared on some sheets.

I don't really understand what is the problem because for the first data, everything is working well.

Do you think it's a problem with Excel options ?

Thanks all,

could u please attach your file

thx
Tuhin-

The file is too big for the forum so this is a link:

http://www.toofiles.com/en/oip/docum...n1_winder.html

And this is the file which is working with other data:

http://www.toofiles.com/en/oip/docum...son1_esth.html


Thanks!