I'm trying to connect from Jdeveloper to a remote Weblogic server. This is what I get when testing the connection.
Some say that one should disable jdeveloper's proxy settings. I did so, and it didn't change anything. Any help !
Try to run your JDeveloper as administrator (it's a common 'mistake' for Windows users). If that doesn't work you should read this blog post: http://sathyam-soa.blogspot.be/2012/06/jdeveloper-11g-cannot-establish-app.html