You might try refreshing the page, some folks have had that problem and that solved it.
BTW... quoting the post just prior to your reply is also frowned upon. We have members from about 150 countries world wide that have to depend upon dial up or pay for bandwidth and excessive quotes not only force everyone to reread what was just posted, it wastes bandwidth as oversize pictures do so that's why the admin requests that we resize pictures and trim back on quoting unless it's relative to a post that is way above the reply.