Updated calender entry syncronization with DAMO

Hi ,

One of our user who is using DAMO is facing problem with the synchronization of updated calendar entry, once he except the changed meeting request in outlook ,the calendar in the outlook gets changed with the updated entry but it is not synchronized back to the lotus ,hence these change is not reflecting on the Mobile through traveler. Can any one suggest what could be the issue .

There is no problem in synchronization of the normal calendar entry.

Thanks in Advance