Cisco :: 5548 - Syncing Nexus And NTP Server

I have problem with syncing Nexus and NTP server. MGMT IP adress of Nexus is 10.24.130.137 and address of NTP server is 10.242.32.12, there is full routing and NTP readability between Nexus and NTP but Nexus is UN synced:
 
N5k-04-A# sh ntp peer-status
Total peers : 1
* - selected for sync, + -  peer mode(active),
- - peer mode(passive), = - polled in client mode
    remote               local                 st   poll   reach delay
------------------------------------------------------------------------
=10.242.32.12           10.24.130.137           2   16     377   0.00310

Config of NTP is:
 
N5k-04-A# sh run ntp
!Command: show running-config ntp!Time: Wed Apr 10 14:41:35 2013
version 6.0(2)N1(2)ntp server 10.242.32.12 use- vrf management ntp source-interface  mgmt0ntp logging.
 
I captured traffic with wire shark and see something strange in NTP Packet: "Reference ID: Un identified reference source '...'"
 
I have one Catalyst 2960 on same sub net and it's synchronized with same NTP without any problems. Here is snapshot of wire shark capture:
  
P.S. Don't bother about malformed packet, it's probably because of using ERSPAN.