RTC always read fixed value

Hi all,
I want to use the RTC module of NS9360. I enabled the RTC in bsp.h and compiled it. the initialization and set time have been successfully done, but when I tried to get time from the RTc, it always read a fixed clock value with a success return value from the function.
I’m using the Raven debugger and Net+os 6.2.
Any clue about something might be wrong? Do I have to set up the clock somehow to let RTC running?
Thanks in advance.

Have you tried installing the BSP Fixes patch? http://ftp1.digi.com/support/patches/BSPFixes_62.htm