Dear all,

I got the solution for the Problem from Philips.

RTC and Watchdog are using the same Interrupt Vektor.
You have do disable the Watchdog and then the Interupts are all serviced.

Code to add for Watchdog:

WDCON = 0x00;
WFEED1 = 0x0A5;
WFEED2 = 0x05A;