I am trying to crate report in crm 2013 on premises using fetch Xml but it was showing error "Unable to connect to data source 'DataSource1'.The connection to server "Server Url" could not be established. Make sure that the connection string and credentials are correct, and try again.

Plz Suggest how to resolve this problem.

but I already try all these steps.Everything is working for online version ,problem is in on premises