I noticed that the O.P. had only made two posts, and assumed that wasn't enough time here to go exploring the: "Go Advanced" button.
Seems to be common on this forum (not being able to find the "attach file" feature).
Then add in the "edit enable minimum" of having to make, what? five? ten? posts before the forum software lets you edit your own post . . .
Which sort of negates my advice (the O.P. can't edit the top post (yet) to attach the file).
Things can be difficult for the new poster at this site.
Perhaps we can get the "attach file" button added to the "Quick Reply" editor.
Last edited by knc1; 10-08-2012 at 08:36 AM.