Well, here I am trying to have a good time and help you have one too.
And here you are trying to get your attachment working and not having success.
I answered the first half of your question.
As to why your attachment didn't attach, well...I guess I'm not the best person to ask that question of. I'd ask yourself, if I was you. And here's why: in my experience, when things don't work, the reason for why that is can be traced, 9 times out of 10, to user error. Attachments are straightforward. Try again.