the server validation on the page is set to validate a form element named Comments which does not exist. the closest i can find is this text area:
<textarea name="Any final comments or suggestions?" id="Any final comments or suggestions?" cols="45" rows="5"></textarea>
the name for this text area is not valid, it contains spaces and punctuation.
the rules for naming a form element are:
1) you may use only Letters and Numbers
2) The only exception is the underscore _
3) The first character of the element name must be a letter.
change the form element name to Comments:
<textarea name="Comments" id="Comments" cols="45" rows="5"></textarea>
you have many other form elements on your page that are not properly named:
<select name="3) If applicable, was our credit department helpful in arranging any financing that you may have needed?"
these will need to be changed as well.