Yesterday I have made a posting here, but it is not shown on the puplic board.

There is only one post after clicking your icon. Please post again to check.

DJI Susan Posted at 2017-10-3 22:43
There is only one post after clicking your icon. Please post again to check.

The old post is in my personal home page but not shown here. Now I have created a new one and it works.

Thank you.

GeorgMarvic Posted at 2017-10-3 22:56
The old post is in my personal home page but not shown here. Now I have created a new one and it works.

Thank you.

Do you mean this one here:
https://forum.dji.com/thread-115353-1-1.html

Looks like something got censored in your first post.