Email form

I saw the tutorial on how to make an email form send automatically. However, I didn’t follow it 100% because I already had a page up and didn’t want to name it contact.htm. Was this my problem?

This was the error
Method Not Allowed

The requested method POST is not allowed for the URL /offer.html.

As you can see, the page is offer.html

The full link to the page is here
http://travisipodstore.serverspeople.net/offer.html

Right now I have it set so that they simply email me.

Please help! Please!!!