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WorldPay/MD5 secret key issues

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31 Jan 2008, 6:46 PM
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designkarma

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WorldPay/MD5 secret key issues

I've successfully installed the WorldPay module, and added the WorldPay Installation ID and MD5 secret key into the module settings. Everything looks fine to me, except I'm getting the following error from WorldPay when I try to process an order:

"Sorry, there was an error in processing this transaction: The information sent from the merchant's site is invalid or incomplete. Please send the following information to the merchant: The transaction cannot be processed due to the following: the MD5 signature could not be verified."

I've double-checked my ID and MD5, so I don't understand where I'm going wrong. :( Can anyone help? Thanks.