Original Title - can not send attachment

Window Live mail sometimes does not allow to send attachment, they go to my Outbox,the email recipients address is typed each attempt, the attachment are Word, and Window Photo viewer1, or  2 or atachments. I even try to send by one only or one email at a time. The person  also send an email and it bounced back, even though she has the same one before.

the same occurs if I tried to send by gmail , but successfully by Outlook.com

what is going on?

thanks

Daisy