hi,

as above issues.
but can see image when i click at the title and view post in single page..
how come i can't view image in front page ?

you are probably displaying the posts as excerpts on the front page. Take a look at the settings at ATO->Configure EXCERPTS. Note that by default, all HTML (that means the <img...> code is stripped out of an excerpt. You can tell the excerpts what HTML to leave in.