Problem: the variable $forum[forumid] is always null
 

I am attempting to implement the following simple conditional statement in my forum's header template: If the current forum is a sponsored one, display banner.

<if condition="$forum[forumid] == 10">
<img src="banner.gif">
</if>

But it is not working because it appears that $forum[forumid] is always null, even when the current forum is forum 10.

Is there any reason that $forum[forumid] would be null?

Would someone provide me a quick snippet of code that *should* display the forum ID? For example, should this work:
<strong>Current forum: $forum[forumid]</strong>

?

Thank you very much,
Will Smith

I figured it out. I was using the variable $forum[forumid] when in fact it should be $foruminfo[forumid]. The final code I am using for the conditional banner display, for those interested, is:

<if condition="$foruminfo[forumid] == 10">
<img src="banner1.gif">
<else />
<img src="banner2.gif">
</if>

Best,
Will