PCK file not contains all files

Hi Experts,

(sorry, I know this is for SCCM 2007 forum, but we are in the progress of migration from 2003 to 2007... hope you still can help)

We have a SMS2003 server which sometimes distributed incomplete package to the distribution points. We found the PCK files are not containing all the files from the source. But if we refresh the distribution point again, the PCK is complete. We have no idea when would this happen, and the sms logs are purged all the times.

Wonder if any of you have seen this type of problem?  What is the root course and how to prevent it happen again.

Thanks

SPC