Problem with EXCEL format while sending a mail with excel attachment

Hi,

I'm trying to send a report through mail as an excel attchment. But though I get all the details in the attachmnet format in excel is not proper. It's in a very hapazard way. I tried putting control break statements after each record then also though there is slight betterment it's not ok. If I send the same thing as a pdf attachment it's perfect. May I know what else i need to do for excel.....? I tried compressing and then sending no luck......

I'm in version 4.6c.....

Thanks in advance....