Thank you for your answer. But I did this. I use the new web.config and copied only the connection string to the new web.config. Then I got this error. I tried to copy the type string from the connection part of the new web.config and adding this type="BugNET.Providers.DataProviders.SqlDataProvider, BugNET.Providers.SqlDataProvider" to my connection string but get also an error "Parser Error Message: Object reference not set to an instance of an object."
What type part do I have to add to the connection part?
What type part do I have to add to the connection part?