You type your post in the box and hit SEND.
You get a pop-up message at the bottom of the screen asking if you want to Open or Save the post you have just written.
You select 'Open'
It then goes into Adobe Acrobat.
After a few minutes your post may / mau not appear on the thread.
We had this very same problem last year and Tech fixed it.
IE9 and Windows 7 on laptop