I dont know how to post replies, or how to send private message, there is nothing on the screen that i can use
When you're logged in to the Forum and reading a post in a thread, there should be a REPLY button (unless it is LOCKED. But you have to be logged in. How are you accessing the Forum? How are you looking for threads you want to see? Searching for thread topics brings up some threads that are ARCHIVED and may not be accessed for reading or replying.