Your connection attempt failed for user '' from your host to server at localhost:NULL:
  Access denied for user 'thufir'@'localhost' (using password: YES)

Please:
1 Check that mysql is running on server localhost
2 Check that mysql is running on port NULL (note: 3306 is the default, but this can be changed)
3 Check the  has rights to connect to localhost from your address (mysql rights define what clients can connect to the server and from which machines)
4 Make sure you are both providing a password if needed and using the correct password for localhost connecting from the host address you're connecting from