Sounds as if your firewall is set to dis-allow attachments.

What size are the files? Nine times out of ten, if they aren't attaching they are too large. A lot of web mails don't have a friendly message to let you know what the reason is, they just go through the motions of uploading (gray bar and all) then when it's done there is nothing there. Are you getting any error messages at all? Are you able to attach using IE? Oh, and about the Yahoo denial: that's in the script that every Yahoo employee is given when hired. Same with AOL,HP,Microsoft,and every other big company out there. It's always someone elses fault. Get used to it. The next thing I would suggest is open your Yahoo in Internet Explorer and try it there. If that works, there is a plug-in for firefox called I.E. tabs. It allows you to render a tab from within Firefox as an I.E. window only it shows as a tab in FF. You will need to re-render before you sign in to Yahoo. It can be downloaded here: https://addons.mozilla.org/firefox/1419/ When you get it installed just right click tabs and click "switch rendering engine". No guarantee it will work but if the files are attaching in IE, this will probablly work for FF. Re: I.E. not working on mac: Understood. The plug-in for FF operates on whateve version of IE you do have in the backround anyway, and I haven't used a MAC in years. The option you are choosing seems the way to go until you get a better answer. In the meantime, you might try http://groups.msn.com/computerhelpclub I've gotten lot of help there for wierd problems over the years. What is with the "not helpful" rate? I know I didn't salve the problem, but the asker thanked me for the help. I think just maybe that means it was helpful.