Hello, I just migrate a working Drupal7 installation from my old server to my new droplet (Ubuntu 12.4). After some trouble with the mysql configuration, which have been solved very quickly thanks to a prompt and plain support, I still have a problem with the authentication system. Unexpectedly, nothing happens by inserting drupal login-information. I can't either access to the administration area, nor get an error. The website was obviously working on the previous server. Does anybody had similar experiences with Drupal? Or some suggestions about how to troubleshoot this?