The Provider tries to add a shared VPS based on the Centos 6 OS template in POA. The following error message appears in the POA Provider Control Panel:
Error VZ template of version is not registered
Shared VPSs based on CentOS6/RHEL6 are not yes supported in POA.
In POA 5.5 the error message has been changed to a more informative one:
Shared VPSs based on .centos-6-x86_64 OS template are not supported
Create a shared VPS based on CentOS 5 or create a physical host / hypervisor-based Virtual Machine based on CentOS 6 and register it in POA.