Decoupler not decoupling

[Helix Wletcher]

I have reached to a point in the career where I have to head to the mun. I have been having problems building a spacecraft. Now that I have built one, the radial decouplers have stopped working lol. I use liquid fuel boosters, 2 of them, and obviously radial decouplers. I have always make sure that the fuel tanks are attached properly to the decoupler and I still face this problem. I do use struts just so that nothing wobbles. Is this because of that? It would be amazing if anyone knew what I could do.

http://imgur.com/a/jI4L9

Edited May 14, 2016 by Helix Wletcher

[Reactordrone]

Your clipped in too far. the decoupler shoes need to be completely visible otherwise the boosters will stay attached to the tank when you decouple.

 

[Helix Wletcher]

I have used the tool... I forgot what that's called. And it's all the way out. The fuel tanks seem to keep on going halfway inside the decoupler though, I always need to set it up properly. I will retry again soon. Thanks for your reply ☺. 

Edited May 14, 2016 by Helix Wletcher
Correction

[Venusgate]

If you've adjusted the tank position all the way out and that's all it goes, then the tank is likely attached to the center tank, rather than the decoupler. I would delete the outboard subassemblies and restart building the boosters from scratch - making sure your placement is straight on the decoupler.