Fehler in .SQL Datei

[Err] 1005 - Can't create table 'rmxosdb.users' (errno: 150)  
[Err] -- SQL Database for RMX-OS
-- by Blizzard
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START TRANSACTION;
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-- these two are used to create the database and can be ommited in case the database already exists
CREATE DATABASE IF NOT EXISTS `rmxosdb` DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
USE `rmxosdb`;
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DROP TABLE IF EXISTS `save_data`;
DROP TABLE IF EXISTS `inbox`;
DROP TABLE IF EXISTS `buddy_list`;
DROP TABLE IF EXISTS `user_data`;
DROP TABLE IF EXISTS `guilds`;
DROP TABLE IF EXISTS `ips`;
DROP TABLE IF EXISTS `users`;
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-- Registered Users
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CREATE TABLE `users` (
??????????????? `user_id` int(10) unsigned NOT NULL auto_increment,
??????????????? `username` varchar(32) NOT NULL UNIQUE,
??????????????? `password` varchar(11) NOT NULL,
??????????????? `usergroup` int(10) NOT NULL default 0,
??????????????? `banned` tinyint(1) NOT NULL default 0,
??????????????? PRIMARY KEY (`user_id`)
) ENGINE = InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
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-- IPs
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CREATE TABLE `ips` (
??????????????? `user_id` int(10) unsigned NOT NULL,
??????????????? `ip` varchar(15) NOT NULL,
??????????????? PRIMARY KEY (`user_id`, `ip`),
??????????????? FOREIGN KEY (`user_id`) REFERENCES users(`user_id`) ON DELETE CASCADE
) ENGINE = InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
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-- Guilds
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CREATE TABLE `guilds` (
??????????????? `guild_id` int(10) unsigned NOT NULL auto_increment,
??????????????? `leader_id` int(10) unsigned NOT NULL UNIQUE,
??????????????? `guildname` varchar(32) NOT NULL UNIQUE,
??????????????? `password` varchar(11) NOT NULL,
??????????????? PRIMARY KEY (`guild_id`),
??????????????? FOREIGN KEY (`leader_id`) REFERENCES users(`user_id`) ON DELETE CASCADE
) ENGINE = InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
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-- Special User Data
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CREATE TABLE `user_data` (
??????????????? `user_id` int(10) unsigned NOT NULL,
??????????????? `notrade` tinyint(1) NOT NULL default 0,
??????????????? `lastlogin` DATETIME NOT NULL,
??????????????? `guild_id` int(10) unsigned default NULL,
??????????????? PRIMARY KEY (`user_id`),
??????????????? FOREIGN KEY (`user_id`) REFERENCES users(`user_id`) ON DELETE CASCADE,
??????????????? FOREIGN KEY (`guild_id`) REFERENCES guilds(`guild_id`) ON DELETE SET NULL
) ENGINE = InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
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-- Buddy List
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CREATE TABLE `buddy_list` (
??????????????? `user1_id` int(10) unsigned NOT NULL,
??????????????? `user2_id` int(10) unsigned NOT NULL,
??????????????? PRIMARY KEY (`user1_id`, `user2_id`),
??????????????? FOREIGN KEY (`user1_id`) REFERENCES users(`user_id`) ON DELETE CASCADE,
??????????????? FOREIGN KEY (`user2_id`) REFERENCES users(`user_id`) ON DELETE CASCADE
) ENGINE = InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
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-- PM Inbox Data
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CREATE TABLE `inbox` (
??????????????? `pm_id` int(10) unsigned NOT NULL auto_increment,
??????????????? `recipient_id` int(10) unsigned NOT NULL,
??????????????? `sendername` varchar(32) NOT NULL,
??????????????? `senddate` DATETIME NOT NULL,
??????????????? `message` text NOT NULL,
??????????????? `unread` tinyint(1) NOT NULL default 1,
??????????????? PRIMARY KEY (`pm_id`),
??????????????? FOREIGN KEY (`recipient_id`) REFERENCES users(`user_id`) ON DELETE CASCADE
) ENGINE = InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
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-- Saved Data
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CREATE TABLE `save_data` (
??????????????? `user_id` int(10) unsigned NOT NULL,
??????????????? `data_name` varchar(255) NOT NULL,
??????????????? `data_value` text NOT NULL,
??????????????? PRIMARY KEY (`user_id`, `data_name`),
??????????????? FOREIGN KEY (`user_id`) REFERENCES users(`user_id`) ON DELETE CASCADE
) ENGINE = InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
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COMMIT;
[Msg] Finished - Unsuccessfully