Please mind the following
1.) Do -not- doublepost
2.) This is an English languaged forum, try using a translater before posting.
3.) It looks like you're a customer. This is only a Directadmin customer forum (who bought directadmin) not a customer forum as in "I use Directadmin". So if you did not buy Directadmin yourself, you need to contact your host for support.
(Si vous n'avez pas acheté Directadmin vous-même, vous devez contacter votre hébergeur pour obtenir de l'aide.)
As for the 500 errors, check the error logs.