migrate vm from xen

Dear masters, XenServer 8.2 Promox 8.2.2 My VM OS: Red Hat Enterprise Linux Server release 5.4 (Tikanga) After I export vm from XenServer then import to Promox, I can not start VM. It said: "No boot device" here is my VM config on promox boot: order=scsi0 cores: 4 cpu: host ide2...