Not able to import ldif

Hi,

when I try to import a ldif-file to my LDAP server I get an error that an attribute-type can not be found. I looked up similar problems here but didn't find a solution. When i check my schema I can find the "missing" attribute type member with m-oid=2.5.4.31. if i create a server locally
the import works fine.

!ERROR [LDAP: error code 16 - NO_SUCH_ATTRIBUTE: failed for MessageType : ADD_REQUEST Message ID : 21
Add Request : Entry
dn[n]: cn=admin,o=LH,ou=organizations,ou=system
objectClass: organizationalPerson
objectClass: person
objectClass: extensibleObject
objectClass: inetOrgPerson
objectClass: top
uid: admin
member: cn=SAMBA_F_SYSTEM_ADMIN_LPS,ou=roles,ou=system
member: cn=SAMBA_F_SYSTEM_ADMIN_LH,ou=roles,ou=system
member: cn=SAMBA_D_SYSTEM_ADMIN_LH,ou=roles,ou=system
member: cn=SAMBA_D_SYSTEM_ADMIN_LPS,ou=roles,ou=system
member: cn=SAMBA_SAMBAJOB,ou=roles,ou=system
member: cn=R_F_MSTR_ADMINISTRATOR,ou=roles,ou=system
userPassword: xxxxxxxxxxxxxx ...
sn: admin
c: US
cn: admin
preferredLanguage: E
: ERR_04269 ATTRIBUTE_TYPE for OID member does not exist!]

could you help me?