Syntax error creating procedure MySQL5

[Asgorath]

I am using mysql 5 and mysql query browser 1.1.15

DROP TABLE IF EXISTS `mindsolutions`.`encomendas`;
CREATE TABLE  `mindsolutions`.`encomendas` (
  `numenc` int(10) unsigned NOT NULL auto_increment,
  `cliente` varchar(45) NOT NULL,
  `dataabertura` datetime NOT NULL,
  `designacao` varchar(255) NOT NULL,
  `obs` varchar(255) default NULL,
  `preco` decimal(10,0) NOT NULL,
  `estado` varchar(45) default '',
  `documentacao` varchar(255) default NULL,
  `responsavel` varchar(45) default '',
  PRIMARY KEY  (`numenc`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

delimiter$$
CREATE PROCEDURE mindsolutions.grava_encomenda (in numenc int(10),  in cliente varchar(45) ,  in dataabertura datetime ,  in designacao varchar(255),  in obs varchar(255),  in preco decimal(10,0),  in estado varchar(45) ,  in documentacao varchar(255),  in responsavel varchar(45))
BEGIN
	if not exists (select * from mindsolutions.encomendas where numenc = numenc);
		insert into mindsolutions.encomendas values(numenc,cliente,dataabertura,designacao,obs,preco,estado,documentacao,responsavel);
END$$
delimiter;

error:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the rigth syntax near ';insert into mindsolutions.encomendas values(numenc,cliente,dataabertura,des' at line 3

Any suggestion?

Regards
Jorge