error 105 mysql FOREIGN KEYS - mysql

Question

I am trying to create database table and get them connected by mysql FOREIGN KEYS. I have ensured that my data types are identical. I also ensure that my tables are made before added the FK. Any advice would be greatly appreciated.
CREATE TABLE IF NOT EXISTS `af_feeds` (
`id` int(64) unsigned NOT NULL AUTO_INCREMENT,
`hash` char(255) NOT NULL,
`seed_id` int(64) NOT NULL,
`category_id` int(64) NOT NULL,
`title` varchar(255) NOT NULL,
`description` text,
`content` longtext,
`publishing_date` varchar(255) NOT NULL,
`link` text NOT NULL,
`status` int(1) NOT NULL,
`create_date` int(64) NOT NULL,
`update_date` int(64) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `hash` (`hash`),
FOREIGN KEY (`seed_id`) REFERENCES `af_seeds`(`id`)
ON UPDATE CASCADE
ON DELETE CASCADE,
FOREIGN KEY (`category_id`) REFERENCES `af_categories`(`id`)
ON UPDATE CASCADE
ON DELETE CASCADE
MySQL said:
1005 - Can't create table 'estafeed_rss.af_feeds' (errno: 150) (Details…)
--
-- Table structure for table `af_categories`
--
CREATE TABLE IF NOT EXISTS `af_categories` (
`id` int(64) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
`description` varchar(255) NOT NULL,
`icon` varchar(255) NOT NULL,
`image` varchar(255) NOT NULL,
`status` int(1) NOT NULL,
`create_date` int(64) NOT NULL,
`update_date` int(64) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=8 ;
-- --------------------------------------------------------
--
-- Table structure for table `af_seeds`
--
CREATE TABLE IF NOT EXISTS `af_seeds` (
`id` int(64) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
`link` varchar(255) NOT NULL,
`category_id` int(64) NOT NULL,
`loading_times` int(64) NOT NULL,
`status` int(1) NOT NULL,
`loading_each` int(64) NOT NULL,
`last_loading` int(64) NOT NULL,
`create_date` int(64) NOT NULL,
`update_date` int(64) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `url` (`link`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=7 ;