"similar threads" box is only displayed in some topics

[NeXuM]

I just realized that the "similar threads" box below the posts is messed up

some of the topics will display the box, and other topics will display nothing

i really don't understand why it works only in some topics

please help me !!

my forum is http://www.pirate-punk.net

here is an example of a topic with a working "similar threads" box :
http://www.pirate-punk.net/message.php?t=9750

and this topic, in the same forum, isn't displaying the "similar threads" box:
http://www.pirate-punk.net/message.php?t=4322

[Marco van Herwaarden]

Maybe there are no similar threads for those threads.

[NeXuM]

my forum have 62,000 posts, there should be similar threads...

here's another example :
http://www.pirate-punk.net/message.php?t=3962

the title of the topic is "Ren? Binam? - Vocations"

there is no similar threads for this topic, but there is multiple other topics named "Ren? Binam?"

like this topic

http://www.pirate-punk.net/message.php?t=3988
called "Ren? Binam? - 71-86-21-36 - R?volution"

[Lynne]

Once a thread is created, the similar threads for it are not updated unless you run the Rebuild Similar Threads function in Update Counters. So, threadid 100 will not suddenly get any similar threads with any threadid about 100 unless you rebuild the similar threads.

[NeXuM]

so if i rebuild the similar threads all of my topic should get similar threads displayed ?

i don't understand because even the threads started today aren't getting any similar threads

[Lynne]

Assuming you aren't doing anything to interfere with the similar threads function (like a mod) and that you have similar threads properly setup and your search indexing is working correctly, then if you rebuild similar threads then it should work.