Hi
If you use vs2003,do you noticed the project property??? there is a "Default namespace"(I dont know if it's this name,I m not use english version VS)
if you fill in wrong name,you will get the similar error info like you.
or you can refers to your efficionconsulting.articles.dll in vs2003,and explorer the class views,,,do you sure there are EfficionConsulting.Articles namepace???