You should be compliant by using major version of X-Payments listed at the PCI council site.
Currently X-Payments version 1.0.x is listed at
https://www.pcisecuritystandards.org/approved_companies_providers/validated_payment_applications.php?agree=true
However, you should understand that "PCI compliance" is not just using PA-DSS certified software. It assumes other requirements, too. PA-DSS certification for software is just one of them.