Now I'm seeking a solution through the Blogger's FAQ and other source. And I changed the comment editor which was embedded with my blog into the new one. According to some bloggers, the problem might happen when you use some particular browser like IE so I would like you to use Google Chrome, Safari for leaving comments on my blog.
I know there are many accesses from you to my blog and I don't think I'm ignored. I hope you can enjoy my blog.