php contact us form doesn't work on my plusnet web space

[#1]

php contact us form doesn't work on my plusnet web space but I have used the code on at least 8 other websites using non plusnet host servers.
Here it works http://www.idylliclocation.co.uk/contact.html
Here it fails to work http://www.nevitt.plus.com/contact.html
Any ideas?

[#2]

You can't host dynamic content on the Homepages servers, you need to use the CGI servers assuming your account type allows access?