I have found the sollution.
I reinstalled SuSe on the same partiton as before.
The installation was successfull. The boot loader is hold by SuSe. My Windows 2003 Server is ok but my Windows XP failed.. the error message was ntoskrnl.exe bla bla...
To bring back the Win XP, I boot from the Win XP cd and repair (Recovery Console). The I choosed the Win XP partition. Then I typed this command: bootcfg /rebuild.
It is done.!!
Thanks to all for their helps and suggestions.