InnoDB and creating relationships for table - one will not join - sql

Question

This is my database:
-- Host: localhost
-- Generation Time: Feb 04, 2011 at 01:49 PM
-- Server version: 5.0.45
-- PHP Version: 5.2.5
SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";
--
-- Database: `myepguide`
--
-- --------------------------------------------------------
--
-- Table structure for table `channel1`
--
CREATE TABLE IF NOT EXISTS `channel1` (
`id` mediumint(255) NOT NULL auto_increment,
`channel` varchar(255) default NULL,
PRIMARY KEY (`id`),
KEY `channel` USING BTREE (`channel`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=4 ;
--
-- Dumping data for table `channel1`
--
INSERT INTO `channel1` (`id`, `channel`) VALUES
(1, 'BBC One'),
(3, '<i>ITV1</i>'),
(2, '<i>ITV2 </i>');
-- --------------------------------------------------------
--
-- Table structure for table `myepguide`
--
CREATE TABLE IF NOT EXISTS `myepguide` (
`id` mediumint(9) NOT NULL auto_increment,
`programme` varchar(255) NOT NULL,
`channel` varchar(255) default NULL,
`airdate` datetime NOT NULL,
`displayair` datetime NOT NULL,
`expiration` datetime NOT NULL,
`episode` varchar(255) default '',
`setreminder` varchar(255) NOT NULL default '<img src="alert.gif" height="16" width="22"> Set Reminder',
PRIMARY KEY (`id`),
KEY `programme1` USING BTREE (`programme`),
KEY `channel2` USING BTREE (`channel`),
KEY `episode` (`episode`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ;
--
-- Dumping data for table `myepguide`
--
INSERT INTO `myepguide` (`id`, `programme`, `channel`, `airdate`, `displayair`, `expiration`, `episode`, `setreminder`) VALUES
(1, 'Casualty', '<i>BBC One </i>', '2011-05-18 14:30:00', '2011-05-18 14:30:00', '2011-05-18 15:00:00', 'No Fjords in Finland', '<img src="alert.gif" height="16" width="22"> Set Reminder');
-- --------------------------------------------------------
--
-- Table structure for table `episode`
--
CREATE TABLE IF NOT EXISTS `episode` (
`id` mediumint(9) NOT NULL auto_increment,
`episode` varchar(255) default NULL,
PRIMARY KEY (`id`),
KEY `episode` USING BTREE (`episode`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ;
--
-- Dumping data for table `episode`
--
INSERT INTO `episode` (`id`, `episode`) VALUES
(1, 'No Fjords in Finland'),
(2, 'Casualty 25th Special'),
(3, 'Palimpsest');
-- --------------------------------------------------------
--
-- Table structure for table `programme`
--
CREATE TABLE IF NOT EXISTS `programme` (
`id` mediumint(255) NOT NULL auto_increment,
`programme` varchar(255) default NULL,
PRIMARY KEY (`id`),
KEY `programme1` USING BTREE (`programme`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=2 ;
--
-- Dumping data for table `programme`
--
INSERT INTO `programme` (`id`, `programme`) VALUES
(1, 'Casualty');
--
-- Constraints for dumped tables
--
--
-- Constraints for table `myepguide`
--
ALTER TABLE `myepguide`
ADD CONSTRAINT `myepguide_ibfk_1` FOREIGN KEY (`programme`) REFERENCES `myepguide` (`programme`) ON UPDATE CASCADE,
ADD CONSTRAINT `myepguide_ibfk_2` FOREIGN KEY (`channel`) REFERENCES `channel1` (`channel`) ON DELETE SET NULL ON UPDATE CASCADE;
I cannot get the 'episode` table to link to that in the table myepguide for some reason, in Phpmyadmin it always says "Relation not added".
Deleting and re-creating it did not work either, so how can I fix this?
All are stored in InnoDB format so I can't understand why this happened.
Any help is appreciated!

Answer 1

As mentioned in the comment, I am not quite sure what are you trying to link here, so for starters you could use this to get an idea of possible relationships.
EDIT
create table TvSeries (
TvSeriesID int not null auto_increment
-- , other fields here
) ENGINE=InnoDB ;
alter table TvSeries
add constraint pk_TvSeries primary key (TvSeriesID) ;
create table Episode (
TvSeriesID int not null
, EpisodeNo int not null
-- , other fields here
) ENGINE=InnoDB ;
alter table Episode
add constraint pk_Episode primary key (TvSeriesID, EpisodeNo)
, add constraint fk1_Episode foreign key (TvSeriesID) references TvSeries (TvSeriesID) ;
create table Channel (
ChannelID int not null
-- , other fields here
) ENGINE=InnoDB ;
alter table Channel
add constraint pk_Channel primary key (ChannelID);
create table Programme (
ChannelID int not null
, StartTime datetime not null
, TvSeriesID int not null
, EpisodeNo int not null
-- , other fields here
) ENGINE=InnoDB ;
alter table Programme
add constraint pk_Programme primary key (ChannelID, StartTime)
, add constraint fk1_Programme foreign key (ChannelID) references Channel (ChannelID)
, add constraint fk2_Programme foreign key (TvSeriesID, EpisodeNo) references Episode (TvSeriesID, EpisodeNo) ;
create table myEpisodeGuide (
TvSeriesID int not null
, EpisodeNo int not null
, ChannelID int not null
, StartTime datetime not null
, SetReminder int not null
-- , other fields here
) ENGINE=InnoDB ;
alter table myEpisodeGuide
add constraint pk_myEpisodeGuide primary key (TvSeriesID, EpisodeNo, ChannelID, StartTime)
, add constraint fk1_myEpisodeGuide foreign key (TvSeriesID, EpisodeNo) references Episode (TvSeriesID, EpisodeNo)
, add constraint fk2_myEpisodeGuide foreign key (ChannelID, StartTime) references Programme (ChannelID, StartTime) ;