We have contacted CMS and their developers are actively working to resolve this issue. In the mean time, please use the Complete Gateway to process payments online. These payments will need to be manually entered in Procentive.
If you do not already have a login for the Complete Gateway (which is separate from the Slyce Gateway) please call CMS support to setup a login.
The Complete Gateway can be accessed at https://secure.completegateway.com/login
This post will be updated once CMS has resolved the issue.
Customer support service by UserEcho