Stuck on POP Warrior Within

[SkylineGT-R34]

Ok, Im stuck at this chapter on POP WW, its called "Garden Hall - Present", I killed all the dudes (4 of them) and now I cant figure out what to do next for the life of me ... anyone knows wtf am I supposed to do ?

 

[Prince of China]

Here is a walkthrough that you can download:
http://www.actiontrip.com/cheats/princeofpersiawarriorwithin.phtml.