Windows 2003 server W32Time errors

How do I fix this error? I think the time is effecting my Acronis true image backups starting & finishing.

Event Type:      Warning
Event Source:      W32Time
Event Category:      None
Event ID:      22
Date:            3/9/2012
Time:            10:09:41 AM
User:            N/A
Computer:      AWW1
Description:
The time provider NtpServer encountered an error while digitally signing the  NTP response for peer 192.168.1.142:123.  NtpServer cannot provide secure (signed) time to the client and will ignore the request. The error was: This operation is only allowed on the primary domain controller of the domain. (0x800708B2)

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.


Event Type:      Warning
Event Source:      W32Time
Event Category:      None
Event ID:      12
Date:            3/9/2012
Time:            10:14:44 AM
User:            N/A
Computer:      AWW1
Description:
Time Provider NtpClient: This machine is configured to use the domain hierarchy to determine its time source, but it is the PDC emulator for the domain at the root of the forest, so there is no machine above it in the domain hierarchy to use as a time source.  It is recommended that you either configure a reliable time service in the root domain, or manually configure the PDC to synchronize with an external time source.  Otherwise, this machine will  function as the authoritative time source in the domain hierarchy.  If an external  time source is not configured or used for this computer, you may choose to disable  the NtpClient.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.