Missing Post

I have a little problem on my new wordpress site. On the category section, the last page always return to 404 although there’s posts there.
e.g: I have 8 post on blog category, each page contain 6 post, when i click to next page or page 2 the 404 shows up).
Here’s my actual site: http://www.javaoverland.com/
I have tried my theme on localhost before upload it and it run well.
I really don’t know what’s going wrong.
So anybody can help me ?? Thanks