VSTA Code not the same in RT than in Develeopment

VSTA Code not the same in RT than in Develeopment

Hi,
I am currently encounter a very serious problem.
Let's say we have a Global and an Integration project. In the integration project I have two more projects (for example P1 and P2)
When I change the VSTA code in P2 it will not be copied to the runtime environment. I have placed a button on a screen which opens the VSTA Editor - there I will not be able to see my changes.
What's wrong??
Thanks.

This is a migrated post! Originally posted on 08.07.2015 by user nollh. Please be aware that information can be outdated.