There are several possible culprits:
- You've set the databases to be shared, but the IP address of your computer has changed (when serving databases, you should use a static IP address or fully resolved domain name like myserver.mycompany.com). If your desire is not to share, then go the Preferences -> Access Configuration and set it to 'Not Shared'. If that preferences does not work for you, watch this movie and instead of checking 'Allow Network Access', please uncheck it.
- The database processes have not started. Database processes are started at boot time and following file is responsible for the startup: Hard Drive -> Library -> StartupItems -> OpenBase -> OpenBase. If that file is not there, please reinstall DayLite completely (not need to delete or uninstall anything).
- A special configuration file is missing. You should have file called localhost in Hard Drive -> Library -> OpenBase -> Config. If that file is not there, you can use a plain text editor to create it with the following content:
localhost
127.0.0.1
Once you've created this file, restart the computer.