No Mover Progess

Here the deal:
Master Server - Windows 2008 running NBU 6.5.4
Media Server - Solaris 10 NBU 6.5.4

When doing a NDMP backup of a large number of files equaling +/- 4 TB from a NETAPP,  I am having a problem with the differentials.
The Full backup works fine, it takes a long time but the backups and restores works. The problem is when I do a Differential
the job fail at the 8 hr mark with the "no mover progress" error. I have tried adding the "NDMP_PROGRESS_TIMEOUT file with 1440 in the file but it still fails after 8 hrs.

Any one  have any suggestions?

Thanks,
Kirby