However it also says that it cant actually access the config file. So Id ignore the original message about corruptionlack of validity as this is most likely just the effect of not being able to read the file due to a lack of authorization. The reason it cannot read the config file is because the process running your web app does not have permission to access the filedirectory. So you need to give the process running your web app those permissions. The access rights should be fairly straightforward, i. If by that you mean that IUSR is not listed in the security tab of the file then its a good thing. One doesnt want to give IUSR any kind of permission to web. The role IUSR is an anonymous internet user. Chess Strategy For Club Players Pdf Free Download. The file web. config should only be accessible through your application. The problem is you havent said which OS and IIS version you are using so its difficult to advise which steps to take. I. e. Your web application belongs to an application pool and so you need to give the permissions to the OS account that your web applications application pool runs under. Often this is something like Network. Service but you may have customized it to run under a purpose made account. Without more info its difficult to help you. The natural progression in the career of most developers goes from uncomplicated procedural programming and desktop applications that use only the resources of the.