[users] Unable to open files

[ope biye]

I have open office version 2.3 and any time I send a document as an attachment 
via email the reciepients are unable to open the documents.How can I resolve 
this without resorting back to Microsoft Office ( which I originally had until 
my hard drive was corrupted)?Thanking YouOpe(PS I paid $11.99 for my download!)
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