You should get that message and then the reply page should show up. I tis because I have not implemented the 'Quote' function as too many people use it when replying to a long post and all you get is a repeat of the original post in bold before you add you two cents worth. I just haven't gotten around to editing the code to remove the button.
Ref. Ultimate Bulletin Board... we left that about 4 months ago and have been using vBulletin since then. UBB couldn't take the pace.