WARNING: callback password does not match...

On my order confirmation email from WorldPay I get the following message:

"WARNING: callback password does not match. This could be a error in your WorldPay configuration or it could be an attempt at fraud."

Solution:

This means that the Callback Password defined in the WoldPay Management System does not match the one you set up in eButtonz under "Configure WorldPay" (see setting up your WorldPay account).

You can either log into WorldPay and delete the one there or log into eButtonz and set the one there. Or reset both to something new.