What error do you get exactly?
Aug 16 11:56:53 imp02 pvedaemon[18413]: start VM 101: UPID:imp02:000047ED:000A791E:502CC3E5:qmstart:101:root@pam:
Aug 16 11:56:53 imp02 pvedaemon[15649]: <root@pam> starting task UPID:imp02:000047ED:000A791E:502CC3E5:qmstart:101:root@pam:
Aug 16 11:56:53 imp02 kernel: device tap101i0 entered promiscuous mode
Aug 16 11:56:53 imp02 kernel: vmbr0: port 12(tap101i0) entering forwarding state
Aug 16 11:56:57 imp02 pvedaemon[15649]: WARNING: unable to connect to VM 101 socket - Resource temporarily unavailable
Aug 16 11:56:58 imp02 pvedaemon[15650]: WARNING: unable to connect to VM 101 socket - Resource temporarily unavailable
Aug 16 11:56:59 imp02 pvedaemon[15648]: WARNING: unable to connect to VM 101 socket - Resource temporarily unavailable
Aug 16 11:57:00 imp02 pvedaemon[15649]: WARNING: unable to connect to VM 101 socket - Resource temporarily unavailable
Aug 16 11:57:01 imp02 pvedaemon[15649]: WARNING: unable to connect to VM 101 socket - Resource temporarily unavailable
Aug 16 11:57:02 imp02 pvedaemon[15649]: WARNING: unable to connect to VM 101 socket - Resource temporarily unavailable
Aug 16 11:57:03 imp02 pvedaemon[15650]: WARNING: unable to connect to VM 101 socket - Resource temporarily unavailable
Aug 16 11:57:04 imp02 kernel: tap101i0: no IPv6 routers present