Missing !DOCTYPE Error

I am from an electronics systems engineering background and am 
retraining for a career in web design. I am following a Certified Web 
Designer & Developer course with the UK National IT Learning Centre 
(www.nitlc.com).

My HTML 4.01 Web Authoring manual suggests your validation service. 
Today I submitted a version of the attached index.html file without a 
DOCTYPE statement, and unsurprisingly the results showed this up. I 
edited the file to include a suitable DOCTYPE statement and resubmitted 
the file (attached), but I keep getting the same results.

I have a validation utility in my editor - HTML-Kit - and it says:
"Doctype given is "-//W3C//DTD HTML 4.01 Transitional//EN""
"Document content looks like HTML 4.01 Transitional"

Why does the validation service continue to say that no DOCTYPE is included?

-- 
Richard Curtis
57 Old Eaton Road
Rugeley
Staffordshire
WS15 2HA

Tel: 01889 577768