Sorry, I posted first on Installation.
I moved a few wordpress installations (2.0 and 1.5) to a newer server.
Once the new DNS IPs were OK I can access WordPress without problem, but spanish language is not loaded anymore.
Settings are the same define ('WPLANG', 'es_ES'); in wp-config.php and es_ES.mo in wp-includes/languages/
I double checked permissions for .mo file an directory.
The old server was
And the new
I also tried to add php_flag register_globals on to .htaccess without success.