It's the second time I install zenphoto. The first time it was fine, but now - on another server - I get the following error message while running setup.php:

[i]Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, service@webmailer.de and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
[/i]

CHMOD 777 was set.

Please help.

It may be a problem with the .htaccess file -- some servers don't support them. Try removing it and turning off mod_rewrite to see if that helps.

Thanks. Well, the "Internal Server Error"-message disappeared, but a database connection is not possible anyway:

I checked password, username etc. and I'm sure it must work.

[i]
MySQL Error: Could not connect to the database server.

Warning: Cannot modify header information - headers already sent by (output started at /mnt/ja2/04/195/00000006/htdocs/gaertnerei-sachse.de/galerie/zen/functions-db.php:19) in /mnt/ja2/04/195/00000006/htdocs/gaertnerei-sachse.de/galerie/zen/auth_zp.php on line 30

Warning: Cannot modify header information - headers already sent by (output started at /mnt/ja2/04/195/00000006/htdocs/gaertnerei-sachse.de/galerie/zen/functions-db.php:19) in /mnt/ja2/04/195/00000006/htdocs/gaertnerei-sachse.de/galerie/zen/auth_zp.php on line 33
zenphoto setup
MySQL Error: Could not connect to the database server.
database not connected

Check the zp-config.php file to make sure you've got the right username, password, host, and database. If you haven't created the database yet, now would be a good time.
[/i]

Okay, i got it. By accident I found out the host is not 'localhost'.

Cool, yeah, that happens sometimes. Like I said in the config, 90% of the time it's localhost, but sometimes not!