hello ! I built apache 1.3.17 and php 4.0.3pl1 with the option --with-ingres on my redhat linux 6.2 server. there was no problems. But when i'm try to connect to the database with this simply script <? $link = ingres_connect( "silus", "admdb", "paswd" ) or die("Erreur de connexion"); print("Connexion réussie"); ingres_close($link); ?> i've the next error : Warning: Ingres II: Server or API error : Unable to authenticate client's user ID. in /home/httpd/html/connect.php on line 11 Warning: Ingres II: SQLSTATE : 08004 in /home/httpd/html/connect.php on line 11 Warning: Ingres II: Unable to connect to database (silus) in /home/httpd/html/connect.php on line 11 Erreur de connexion Does anyone use php4 with ingres II database ? Could you help me, please ? thanks for our answers. david.