PHP variable problem

Hi,

I have a problem which I cannot for the life of me work out why it is occurring!

If someone would be kind enough to take a quick look at a sample page i’ve set up, its just a straight forward form which I cannot get to send.

When successfull it should direct you to google.co.uk, else, return an error message.

www.tomhorner.com/test/contactform.html

Thanks alot