Error with special characters when adding entry to ldap

My first post in the forum, if something is wrong or incomplete please say.

I am trying to add an entry to openldap using the lib Paddle. But when the user name contain some special character the request fail, pointing a syntax error in sn.

Maybe I am making something wrong but when I try to add this entry

[
  objectClass: ["top", "person", "inetOrgPerson"],
  cn: "rodrigo+1@email",
  sn: "Rodrigo Rebouças",
  displayName: "Rodrigo Rebouças",
  uid: "na",
  mail: "rodrigo+1@email",
  userPassword: 123
]

I receive:

14:47:07.844 [debug] add request = {'AddRequest',
                  "cn=rodrigo\\+1@email,ou=users,ou=opengalaxy,dc=opengalaxy",
                  [{'AddRequest_attributes',"objectClass",
                       ["top","person","inetOrgPerson"]},
                   {'AddRequest_attributes',"cn",["rodrigo+1@email"]},
                   {'AddRequest_attributes',"sn",["Rodrigo Rebouças"]},
                   {'AddRequest_attributes',"displayName",
                       ["Rodrigo Rebouças"]},
                   {'AddRequest_attributes',"uid",["na"]},
                   {'AddRequest_attributes',"mail",["rodrigo+1@email"]},
                   {'AddRequest_attributes',"userPassword",["123"]}]}

14:47:07.845 [debug] add reply = {ok,{'LDAPMessage',2,
                    {addResponse,
                        {'LDAPResult',invalidAttributeSyntax,[],
                            "sn: value #0 invalid per syntax",asn1_NOVALUE}},
                    asn1_NOVALUE}}

Alas, to make it clear when I just change ç for c in the sn parameter:

[
  objectClass: ["top", "person", "inetOrgPerson"],
  cn: "rogen@email",
  sn: "Rodrigo Reboucas",
  displayName: "Rodrigo Reboucas",
  uid: "na",
  mail: "rogen@email",
  userPassword: 123
]

Everything runs fine:

14:50:31.698 [debug] add request = {'AddRequest',
                  "cn=rogen@email,ou=users,ou=opengalaxy,dc=opengalaxy",
                  [{'AddRequest_attributes',"objectClass",
                       ["top","person","inetOrgPerson"]},
                   {'AddRequest_attributes',"cn",["rogen@email"]},
                   {'AddRequest_attributes',"sn",["Rodrigo Reboucas"]},
                   {'AddRequest_attributes',"displayName",
                       ["Rodrigo Reboucas"]},
                   {'AddRequest_attributes',"uid",["na"]},
                   {'AddRequest_attributes',"mail",["rogen@email"]},
                   {'AddRequest_attributes',"userPassword",["123"]}]}


14:50:31.703 [debug] add reply = {ok,{'LDAPMessage',2,
                    {addResponse,{'LDAPResult',success,[],[],asn1_NOVALUE}},
                    asn1_NOVALUE}}

Sounds like encoding to me or if I done something wrong please tell me, thanks!!