Error on <authentication mode="Forms"> when publishing

Question

Hello,

 

I have my web application working on development computer and I want to publish the application on a Windows Server 2008 localhost.

 

I have setup the IIS on Windows Server 2008 and works fine. I also publish the application and added it under Default Web Site on IIS. (ASP.NET is installed on Server Roles)

 

My problem is when I run the application on server I get error on web.config in line "<authentication mode="Forms"> "

 

How can I set up users and roles on server as I did in development computer? (ASP.NET Web Site Administration Tool).

 

I've search for a tutorial but I couldn't find any, so any kind of help would be appreciated. 

 

Thank you in advance.