This is different scenario here:

I have two Cisco IPS 4260-k9 and both are in production now.

One of the IPSs is configured with NTP and works fines, but another one is not.

When tried to configure when the device is ON and live in production and got the following error,

Error from CLI:

" Error: Cannot connect to NTP server or NTP server is not running "

Error from IME:

" Delivery failed.

err Unaccepable Value - cannot connect to the NTP server or NTP server is not running"

I am able to reach the NTP server, also the same NTP is working fine with other devices....

Am I doing anything wrong?

Please advise