Get post link in forum from cms

[thienduy]

When "promote to artice" from forum.i want to click the title of that post in CMS, it will be linked to that original post in forum.
i'm trying to copy the code to get original link in:
vbcms_content_article_page :

PHP Code:

<a href="{vb:raw post_url}">{vb:rawphrase view_original_post}</a> 


and paste to
vbcms_content_article_preview

.But it can get the link of original post.
Can anybody help me?
thanks