I have a DNN 3 site that has been up and running for a little over 4 months.  Recently my host provider moved the site to a new and faster server.  Once the site was moved I could not login as Host nor Admin and none of the user accounts could login, also it would not alow a new user to register.

After looking a the Web.config file I discovered the <add key="MacineValidationKey" and the <add key="MachineDecryptionKey" values did not match what was on the old server, how that happend ????  So I copied the values from the original config file into the new site config.  Now it will register a new user but it will still not allow the login of any prior user, admin or Host so of course I can not change any thing on the site.

Does anyone know how I can fix this problem or will I need to wipe out the site and build it all over again with a fresh copy?

HELP?

Thanks

Thanks for the reply Shawn but I've check all that and not the problem. 

I set up a new protal 3.5 in localhost and changed the values in the web.config file, after loginnig in once and it gives the same error when you tried to login. So I changed it back to the original values but then I get the message "passwords are case sensitive" but still can't login.

I found an article on the forums that I could register a new user then go into the DB and change them to the host so I did and it let me in as host. Now i have a new problem that the e-commerce portal store gives me a cricital error msg and won't open.  I assume that has to do with security and the change I made to the host account so now I need to figure where I can change that record in the database.

I do appreciate you taking your time to help.