[Resolvido] Recorrência na aplicação calendário não funciona

Criei um calendário com uso do banco firebird e tudo funciona normal menos a recorrência.
Pode ser a estrutura do meu BD?
No campo recorrencia ele guarda de forma normal o Y ou N

Este é o ddl da minha tabela no firebird:

/******************************************************************************/
/*** Generated by IBExpert 24/09/2010 04:52:05 ***/
/******************************************************************************/

/******************************************************************************/
/*** Following SET SQL DIALECT is just for the Database Comparer ***/
/******************************************************************************/
SET SQL DIALECT 3;

/******************************************************************************/
/*** Tables ***/
/******************************************************************************/

CREATE GENERATOR GEN_CALENDARIO_ID;

CREATE TABLE CALENDARIO (
CHAVE INTEGER NOT NULL,
TITULO VARCHAR(50) COLLATE PT_BR,
DESCRICAO BLOB SUB_TYPE 1 SEGMENT SIZE 80,
INICIO TIMESTAMP,
FINAL_DATA DATE,
FINAL_HORA TIME,
RECORRENCIA CHAR(1),
PERIODO CHAR(1)
);

/******************************************************************************/
/*** Primary Keys ***/
/******************************************************************************/

ALTER TABLE CALENDARIO ADD CONSTRAINT PK_CALENDARIO PRIMARY KEY (CHAVE);

/******************************************************************************/
/*** Triggers ***/
/******************************************************************************/

SET TERM ^ ;

/******************************************************************************/
/*** Triggers for tables ***/
/******************************************************************************/

/* Trigger: CALENDARIO_BI */
CREATE OR ALTER TRIGGER CALENDARIO_BI FOR CALENDARIO
ACTIVE BEFORE INSERT POSITION 0
as
begin
if (new.chave is null) then
new.chave = gen_id(gen_calendario_id,1);
end
^

SET TERM ; ^

/******************************************************************************/
/*** Privileges ***/
/******************************************************************************/

Obrigado

Descobri que para ter recorrência é necessário definir a data final la na na frente.
Se quero recorrência da data de aniversário devo definir data final como 2030 por exemplo.
Meio estranho este comportamento em relação a outros aplicativos de calendários.
Obriagdo

.