hello guys when enable  <useldapserver>1<useldapserver> and login its return error 500
when i use  ldapsearch -x -LLL -H ldap://10.4.0.3 -D "cn=admin,OU=Students,OU=ISUMS,DC=isums,DC=jo" -w "password" -b "DC=isums,DC=jo" "(objectClass=user)" i got the results fine 
but in logs 
LDAP search failed to return object : 000004DC: LdapErr: DSID-0C090A58, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, v4f7c at /usr/share/koha/lib/C4/Auth_with_ldap.pm line 99.