This is a mod_rewrite problem. In your .htaccess file, do you have the following line in it:

Code:
RewriteRule ^tag/(.*)/(.*) tag.php?search_id=$1&page=$2  [L,QSA]
It should be after:

Code:
RewriteRule ^view/(.*)/(.*)/ view_video.php?id=$1  [L,QSA]
but before:

Code:
RewriteRule ^channel/(.*)/(.*)/recent/(.*) video.php?category=recent&chid=$1&page=$3
Also, is vShare running from the root of your domain (http://www.example.com and not http://www.example.com/vshare)?