Drupal - 在左侧栏上显示论坛

Using Drupal 6 : 
Theme is Garland 6.12

How do I add a link for my forums and show it on the left side bar?
I have tried the following(and it didn't work) :
1. Moved "Primary Links" block to "Left Sidebar"
2. Added "?q=forum/1" to "Pages:" in "Primary Links"

Neither do I see "Primary Links" on my home page,
nor do I see a link for forums.

How to do it?

Using Drupal 6 : 
Theme is Garland 6.12

How d