On the "Contact_OK" is no form, 
that does not matter.
the action of the form is to post to the Contact_OK page. all form processing must occur on the forms action page. Sending the email is a part of processing the form, so the email behavior must be on the Contact_OK page, since that is where the form posts to.
in an earlier post you wrote:
UE Response.Redirect ("") AND form action="Contact_OK.asp">>> the Captcha works, but the UE doesn't work.
the captcha works in this configuration because the code to validate the captcha is on the Contact_OK.asp page. the email does not work, because the code to send the email is on the same page as the form.
you then wrote:
UE Response.Redirect ("Contact_OK.asp") AND form action="">>> UE works no matter the captcha-field is empty, wrong or right, so the Captcha doesn't work.
the email works because the action of the form is set to post to the same page the email behavior code is on, captcha does not work because the form does not post to the Contact_OK.asp page.
either add the code for captcha to the form page, and change the action to be blank, or leave the action posting to the Contact_OK.asp page and add the Email behavior to the Contact_OK.asp page.
either way: All Form Processing MUST Occur on the Forms Action Page
