Thankyou for your prompt reply, unfortunately I am definitely sending
the document electronically and not saving to a removable media.
thanks again


Hi Richard,

Do you send the files by email? Then probably your mail program is destroying
the files.
Zip them up... That way, the recipient will at least see when the file has been
damaged (since s/he'll get a warning about an invalid checksum on unzipping).

Regards,
Klaus