Your account must be correctly setup by WorldPay to handle the HTML Redirect Integration. Sign into your WorldPay account and go to "Installations" and then "Integration Setup" for the relevant Installation. Make sure the Installation ID matches the one you entered for the account in Payage. You must set the following fields:
| Field | Value |
|---|---|
| Payment Response URL | |
| Payment Response enabled? | Enabled |
| Enable the Shopper Response | Enabled |
| Payment Response password | The Response Password you entered in Payage |
| MD5 secret for transactions | The MD5 Secret you entered in Payage |
| SignatureFields | amount:currency:cartId:instId |
Copy the "Payment Response URL" and "SignatureFields" text to the fields in your WorldPay account exactly as shown above. If any of these fields are missing from your account, contact WorldPay support quoting your Installation ID and tell them which fields are missing.