Notification event - Adapter nceviadminp: Cannot retrieve Health Information from vCenter's Health Service located at URL

Hello

I added  VC to VRO in 6.5,  i use to get the error Notification event - Adapter nceviadminp: Cannot retrieve Health Information from vCenter's Health Service located at URL.

i ignored it because  Data collection was working fine, later i saw Data collector stopped collecting data. it worked max of 20 mnt and stops.

Later i was thinking Issue might be with 6.5 new version.

I configured 6.4 still i have same problem, let me know if any one has rectified the issue.or facing same issue.

Thanks