Quote:
Online. Is there a link to how to solve the problem?
Read the message carefully: it says that it either can't find SQL server at the address given in your connection string, or the server is hosted on a different computer which is not configured to allow remote computers to access the DB server.
There is no software cure for that that we can give you: you need to check the actual connection string you are using, then check that server at the other end of it - if it is a web-based server address, then the DB admin for that specific server needs to allow remote connections - which he is unlikely to do as they are generally disabled for security reasons.
We can't help you with that: we have no access to either your code, your connection string, or the remote server!