how to recover a corrupted excel file ?

HI

We have a file server with windows 2003 sharing some folders, since the last lost of energy the server restarted but we have noticed that some excel files are now corrupted, we got the following message:

"Excel cannot open the file myfile.xls because the file format or file extension is not valid"

We have tried to open and repair the file, but always appears an empty file.

Also, We tried "Excel repair toolbox" application but this tool indicates the following:

"All bytes in the file myfile.xls are equal zero. Program can not do anything with an empty file"

Any ideas?
Regards.
dimensionavAsked:
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Martin LissConnect With a Mentor Older than dirtCommented:
I hate to be the bearer of bad news but I hope you have a backup because the file is totally blank.
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Martin LissOlder than dirtCommented:
Can you attach one of the files?
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dimensionavAuthor Commented:
Martin Liss, the information should be absolutly private would be possible to send it to you by email?

chilternPC: I have tried those with no success.
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dimensionavAuthor Commented:
One more question, do you think that the unexpected restart could cause this issue? Or what would be the source of this problem? Damaged hardware, perhaps?
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Martin LissOlder than dirtCommented:
Stick an "h" middle initial in my name and you can email me at gmail.com and I guarantee I won't share the workbook or its information with anyone.
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dimensionavAuthor Commented:
Martin, I have sent it to you.
Thanks.
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Martin LissConnect With a Mentor Older than dirtCommented:
Here's the first part of what a hex editor shows for the contents.
blank
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dimensionavAuthor Commented:
Wow, really bad news, anyway, do you know what is the source of this problem? How to avoid it in the future?
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Martin LissOlder than dirtCommented:
...do you know what is the source of this problem? How to avoid it in the future?
Sorry, but I have no idea for either of those.
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