Secondary DC is not syncing time with Primary DC?

Hi All,

I'm working with a mixed domain (W2K3 and W2K8) with a Server 2003 R2 Std SP2 Primary Domain Controller and a server 2008 Std SP2 Secondary Domain Controller. The PDC is the domain's time server but unfortunately the SDC won't sync its time with the PDC. Is there a way in which I could configure the SDC to properly pick the time up from the PDC?? Does W2K8 have a problem with W2K3 being the time server??

Thanks in advance.