Phpmyadmin INSERT error

I have just upgraded to Apache 2.2, Mysql 5 and PHP 5.2. When I do a manual insert into phpmyadmin data base the id will not auto increment. The following error is returned:

#1366 - Incorrect integer value: '' for column 'id' at row 1

I have set the field to read as id, int, not null, auto_increment, primary key.

Is it a bug?
How do I fix it?

This is the Export SQL. Data is only added to db if I insert by using a form or if I manually add the next id number. I did not have to add the id number manually before I upgraded and can't work out why it is happening now. Any suggestions would be helpful.

phpMyAdmin SQL Dump
-- version 2.6.3-pl1
-- (URL address blocked: See forum rules)
--
-- Host: localhost
-- Generation Time: May 12, 2007 at 09:37 AM
-- Server version: 5.0.37
-- PHP Version: 5.2.1
--
-- Database: `school_2007`
--

-- --------------------------------------------------------

--
-- Table structure for table `testing`
--

CREATE TABLE `testing` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(50) NOT NULL,
`address` varchar(50) NOT NULL,
`town` varchar(50) NOT NULL,
`phone` varchar(20) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=5 ;

--
-- Dumping data for table `testing`
--

INSERT INTO `testing` VALUES (2, 'sue', 'wilmot rd', 'glen alvie', '098878755434');
INSERT INTO `testing` VALUES (3, 'Lizzie', 'The Couch', 'Dullsville', '000000000000');
INSERT INTO `testing` VALUES (4, 'Trev', 'fjasfjfj', 'jgdsgjsdgj', '35723857');