A complete shot in the dark. You don't have a closing html for the form=method. Stick a {/form} on the end.

Wait, you're using iWeb. iWeb doesn't contain the ability to make forms so you need a third party cgi or javascript. (Which I guess you must be using since you got this far. )

So it could be a simple nonclosing of an HMTL call. Are you using something like BBedit to colorize the HTML? It can be handy for figuring out where the messed up code is.