how i converte my exel into xls. fotmat for e-mail

[gomex const]

I've recive e-mail into exel format .xls and when I return to my custumer was
..xlsx
what I need to do thank you

 

[Mark]

Hi

Download the Microsoft Office Compatibility Pack from
http://www.microsoft.com/downloads/...70-3AE9-4AEE-8F43-C6BB74CD1466&displaylang=en

Cheers
Mark