Siemens Amilo Pi1556 BiosPassword Help

[Deathadder205]

Hi, I have Amilo Pi1556 Notebook from my friends and I can't access the bios. I also tried the master passwords, but no luck.
Anybody know, how i can resettet the cmos?
This notebook have a Phoenix Bios...Please help me...

Fujitsu Siemens Amilo Pi1556
Reg No: P53IN0
SN: YSLQ020820