Cannot add image to thread

Hello!
I've recently opened a thread and I saw my image wouldn't appear there.
I saw somewhere that it says I need certain amount of massages for it to appear.
Could anyone tell me how many posts I need?
Thanks :)

20-50 Posts.
The amount changes from time to time.

Oh right, some guy just told me on Skype that I need 20.
Thanks for the info, moderator can lock.

Thanks for the thread! Was just wondering the same thing hehe.