Sorry to drag this old thread back to life, but as a newbie here, I found no info on this rule anywhere in the FAQ or forum rules - maybe I overlooked it though...?
It's a long time since I signed up but I'm pretty sure when you first do there is something that states that you will be under moderation until you have posted a certain number of posts. Generally this is five, but sometimes it can be more.
Found it in the "Welcome to diyAudio" mail, sent out at signup. Weird I didn't see it, I usually always read all kind of "license agreements" thoroughly