How to debug - Connection to the server cannot be established

I get a error message when trying to use theColdFusion Report Builder Report Creation Wizard

When I go to create my Query I get[ColdFusion Report Builder] The Connection cannot be established [Ok]

I cannot find a error log or any kind of help document to find out why The Connection cannot be established.

I setup a localhost coldfusion test server with the exact same settings as my remote server and I can connect to the test server but the remote server will not work.

Where do I start please help I'm on a time sensitive project?