I have created a solution that adds a new button to the ribbon, it works fine in the test environment where I could deploy it with Visual Studio 2010. I have deployed the solution in the production environment by first adding the solution with SharePoint 2010 Management Shell, then deploying it in Central Administration (had to do that because it was global), and finally activating the feature in the solution. I have also added the button image files. I get no error messages, but the button is not there in the lists (in views, in List Tools) where it is supposed to be. Any ideas?