why my post is unable to post it here

I don't know. Is it possible it contained a link that looked like spam. I do see that you have several posts on the board.

I see it, it is right up there on top!

This is a moderated board, so if you post something like looks like it is promoting a company or is otherwise spam like, the moderators will take down your post, especially if you don't have a posting history here. Or you could have made a mistake in posting.