if subscribed to forum?

[Dr.CustUmz]

is there an if condition for is the user is subscribed to a forum

in forumhome_forumbit_level2_post

there is
<if condition="$show['forumsubscription']">

what im trying to do is add links to that same template

<if condition="$show['forumsubscription']">
<a href="subscription.php?$session[sessionurl]do=removesubscription&amp;f=$forum[forumid]" rel="nofollow" title="$vbphrase[unsubscribe_from_this_forum]">$vbphrase[unsubscribe_from_this_forum]</a>
<else />
<a href="subscription.php?$session[sessionurl]do=addsubscription&amp;f=$forum[forumid]" rel="nofollow" title="$vbphrase[subscribe_to_forum]">$vbphrase[subscribe_to_forum]</a>
</if>

but im not getting any results, do i need to enable an option? cause i cant find one =/