feedback form error redirect

[#1]

Hello.
I've had a few issues trying to get a simple feedback / enquiry form working on my site using ccgi/username etc
In the end, I tried the "easy" option: //homepages.plus.net/cgi-bin/form
and this seems to work fine... except
Although the "thanks" redirect works ok, the missing fields one still takes you to the thanks page, rather than the error page. I search this forum and another user point at this:
<input type=hidden name="missing_fields_redirect" value="http://your.host.com/error.html">
which I have adopted and included into my page.
After a bit  of testing, a missing field won't send the email, but still takes you to thanks.html.
any ideas?
Thanks

[#2]

I have just created a form using our feedback form with the following form elements.
recipient, subject, realname, missing_fields_redirect, redirect, required, req1, req2, req3, opt1, opt2, opt3
I added a value of "req1,req2,req3" to the required element and tried it out.
Redirected me according to the values provided, validating it correctly and receiving the message when expected. ie, I got a failed messages when validation failed, and an email and success page when it passed.
Do you have an example page this is occurring on, and I can take a look for you. PM me if you do not wish to make the address public.

[#3]

This is obviously further beyond me than I thought 
I'm unsure of the correct syntax for the required values,
Happy to post the URL if it helps others:
http://nimbusphotographic.co.uk/contact.html
Please note, the site isn't finished yet! 

[#4]

From that we can see you need a "required" hidden form field, to ensure that you specify which items are a must.
I would suggest something like "name,email,text area" as the value for this

[#5]

Ok..
I've added these;
<input type=hidden name="required" value="name">
<input type=hidden name="required" value="email">
<input type=hidden name="required" value="text area">
And it's nearly there!
If I miss out the name or the content, it returns the error page,
but if all i do is put "rob" in the email field and nothing in the name or test area, it goes to the thanks page.
But thanks for your patience so far! 

[#6]

Ahh, not quite
Try the following
<input type="hidden" name="required" value="name,email,text area">
The value is a coma seperated value of all the fields that should exist

[#7]

Fantastic!!!
Ahh.. all it takes is the know-how and you yourself can be a god!!
Thanks so much