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I can see you have opened another thread about this, here is the link and you even received a reply there, please take a look: https://www.jotform.com/answers/931168
Additionally I have submitted the form that you integrated with WorldPay and I got this:
What I would suggest you is to check your Installation ID, seems like the one you have provided does not work, here is a link that will help you with that:
If you want to ensure that your Installation ID works fine, please contact WorldPay support on this link: http://www.worldpay.com/global/support