I created an Addin for word 2003 using visual studio 2008.

It runs fine in the development environment.
When i install it on the same development machine using a setup
project (not clilkonce) the addin does not load. When i open the "com
add-ins" dialog in word 2003 i see the addin. It is unmarked and the
loadbehavoiur description is: "Not loaded, A runtime error occured
during the loading of the COM add-in".

I the setup project i did use custom actions to handle security for
the addin assembly.