But...But...is not that I don't acknowledge your reply.
It's only awaiting Moderation! 
http://www.thinkgeek.com/images/products/zoom/e362_comment_moderation.jpg
No, but yeah...people helped me countless of time and I can't always tell them how much I thank them. I'm always totally acknowledging any small or big help, but I don't always tell my helper. I think it's the same for everyone.