This is the piece of code you ask :
if ((cStr(Request.Form("VraagOpmerking")) <> "")) then
'WA Universal Email object="CDOSYS"
'Send Loop Once Per Entry
'Send Mail All Entries
if ("Contact_OK.asp"<>"") then
I tried a few changings to help you :
UE Response.Redirect ("") AND form action="Contact_OK.asp"
>>> the Captcha works, but the UE doesn't work.
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.
I think there must be the conflict ?