Your post (above) is now visible on the forum, after being approved by a moderator. It is something which is routinely done to the first few posts by new members.
That was your first post which has appeared on this forum. Checking the Activity Stream, no more posts with your username are listed.
Sometimes a moderator must move a post, or re-work it so it conforms to forum guidelines, etc. Sometimes a post has to be deleted.
As for your previous attempt to post a reply, which you state was unsuccessful, perhaps it's because your member registration was still being processed? Because your post above demonstrates you have now succeeded at posting a message.