I'm having a problem with a Word 2007 add-in I made. When I click on Add-Ins, the icons of the add-in show, but they are greyed out and disabled.

This is occuring when I obfuscate the dlls I have made with a comercial obfuscation tool and re-sign them before building a .msi file to install the add-in. I have placed messages in the add-in to report its startup and it appears to initialise, but I can't debug it. I couldn't find any code to set enabled = false.

What are the reasons this can happen (apart from the obfuscated version being somehow wrong)?