Message preview customization

Technical Details

Forum version : #phpBB2
Position : Founder
Concerned browser(s) : Google Chrome
Who the problem concerns : Yourself
Forum link : http://hogas.huhohi.com/

Description of problem

Hello!

I have customized message view in my forum.
I have tried customizing preview as well, yet I have issue. The code in preview:

Code:

<td><div class="postbody">{MESSAGE}</div></td>

This includes message and signature. My style is applied only to message part. Any ideas how to change it?
Tags used in messages do not work in preview. Example:

Code: {postrow.displayed.MESSAGE}