MySQL error number 150

[subuntug]

Hello everybody;I'm newbie in MySQL databases. I create a table with phpmyadmin and each time it returns to me this error:#1005 - Can't create table 'mydb.centres' (errno: 150)Here's my table:

CREATE TABLE IF NOT EXISTS `mydb`.`CENTRES` (`idCENTRE` VARCHAR( 45 ) NOT NULL ,`nom` VARCHAR( 45 ) NULL ,`adresse` VARCHAR( 45 ) NULL ,PRIMARY KEY ( `idCENTRE` ) ,INDEX `idFORMATION` ( `idCENTRE` ASC ) ,CONSTRAINT `idFORMATION` FOREIGN KEY ( `idCENTRE` ) REFERENCES `mydb`.`FORMATIONS` (`idFORMATION` ) ON DELETE NO ACTION ON UPDATE NO ACTION ) ENGINE = InnoDB

Can you tell me where is my error ?Thank you in advence for your help

[justsomeguy]

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