Hello, It's the first time i configure a connection between koha and a ldap. I don't succeed (only one try would have been fantastic). This is an extract of my file <auth_by_bind>1</auth_by_bind> <!-- set to 1 to authenticate by binding instead of password comparison, e.g., to use Active Directory--> <principal_name>uid=%s,ou=people,dc=ecp,dc=fr</principal_name> <!-- optional, for auth_by_bind: a printf format to make userPrincipalName from koha userid --> <mapping> <!-- match koha SQL field names to your LDAP record field names --> <firstname is='givenName'></firstname> <surname is='sn'> </surname> <address is=''>Ecole Centrale Paris</address> <city is=''>Chatenay-Malabry</city> <zipcode is=''>92290</zipcode> <branchcode is=''>ECAM</branchcode> <userid is='uid'></userid> <password is='userPassword'></password> <cardnumber is='ecpbadgeNumber'></cardnumber> <email is='mail'></email> <categorycode is='supannEtuDiplome'>employee</categorycode> <phone is='telephoneNumber'></phone> I don't find where is the problem. Mapping between koha and ldap seems to be good. But, in logs, i see this problem [Wed May 30 14:58:07 2012] [error] [client 138.195.48.69] [Wed May 30 14:58:07 2012] opac-user.pl: DBD::mysql::st fetchrow failed: fetch() without execute() at /usr/share/koha/lib/C4/Auth.pm line 1463, <DATA> line 558., referer: http://koha.ecp.fr/cgi-bin/koha/opac-user.pl An idea? Best regards samuel