[Ted S]

great mod.. but i dont understand how it works.

That's a bit of an odd statement but ok....

i mean, i have set all my forum in order to let see the subjects but not read the threads to not-registered users.

Now i have installaed your mod but, if i try to read a thread not logged on, i see the normal error message that explain that i dont have permission or.. etc..

If you've set your forums not to let guests view threads then this mod won't do anything. The point of the mod is to stop people from viewing more than a certain number of threads (i.e. they can see 5 then can't see anymore) hence the name "limited guest viewing". To make it "work" they [guests] have to be able to see threads. If you don't want them seeing threads ever don't use this mod.