Virtuozzo mounts your
VPS Hosting when you use more than alloted resources so you need to check your CPU usage, Bandwidth usage and RAM usage from your Power Panel as well as your WHM.
Everytime when our guys start your
VPS Hosting then the initial resource usage is low and its not possible for us to keep on monitoring it for days. You should consider a
dedicated server for reliability when you have so much problem with a
VPS Hosting.