Once the software list has been created and deployed to the vPro devices, the local agent registers with the watchdog. Can you verify if any of the applications on the list has stopped running? This can cause it to expire.
Other things to try.
-Remove and Recreate the watchdog
-Decrease the Heart Beat Interval
-Decrease the Startup Interval
-You can also manually modify the default settings here: Program Files\Hewlett-Packard\HPCA\OOBM\Conf
The file is called "config.properties"