Hi,
If your email address is right then you sent any picture. If your email id right or not any picture sent or not upload it means your net slow issue. If virus available in pc may be problems. Or you are upload picture in email visit this link.

http://email.about.com/od/windowslivehotmailtips/qt/How_to_Send_a_File_Attachment_with_Windows_Live_Hotmail.htm

Thanks.
Hotmail Support