Configuration system failed to initialize smtpop.dll

Question

Hi,

I am now trying for a few days to resolve an error.

I created a project to read from a pop3 emailbox and get the attachments from all messages, save them to a local folder.
I used the smtpop.dll freeware library.
I worked with the code on this site: http://www.fryan0911.com/2009/05/how-to-read-pop3-email-using-c.html

This is working fine in debug mode. All attachments get pulled from the emails and saved to folder.
But... when i build the project and try to run the project, from the /release folder or any other pc, then i get the error:Configuration system failed to initialize
I placed the smtpop.dll in the same folder as the .exe
i referenced and used the .dll as described on the website.

What am i doing wrong, why do i get the error after building and not while debugging ?

Can anyone shed some light on it ?

rudy