Undock button not showing... Help!

[X_Splinter]

So I was making my first Minmus surface base. The first part went perfect. But when I came back to pick up the 2nd part I am unable to undock. There is no undock button

 

What I am doing wrong???

Is there anything I can do?  Took me long to do this

Edited May 13, 2016 by X_Splinter

[Torih]

Can't tell from the picture, is it connected to another docking port. You need two. If you do have two, click the other one.

[X_Splinter]

It was a Clapotron attached to a BZ-52 port. I went to the ship builder and load the ship. Aparrently the Calpotron became merged with the BZ-52. I wounder if this is a bug. Now I got a useless ship

[X_Splinter]

It was a Clapotron attached to a BZ-52 port. I went to the ship builder and load the ship. Aparrently the Calpotron became merged with the BZ-52. I wounder if this is a bug. Now I got a useless ship

 

EDIT: I remade the second on Kerbil and save edited to Minmus orbit