Forms that look OK in Dreamweaver and Firefox drop down the page when viewed in Internet Explorer

Please take a look at this page

http://www.matrixmusicschool.co.uk/subscribe.html

When viewed in Dreamweaver the form with the words "Salutation*    Mr     etc

is tight under a line with the graphic  Subscribe to the Matrix ... above it.

In Firefox it is a few mm down

In Safari on a Mac it is about 2 or 3 cms down

In Internet Explorer 6 on a PC it is 7 or 8 cms down.

Why?

Is there anything one can do about it?

Thanks.

George