02 WRX boost oscilliation HELP!!!

Hi guys! After I have a newer turbo swaped,
it starts to boost oscilliation.
So far I change some vacuum hoses from autozone(with the pill inserted back) ,
adjusted wastegate arm and clean the bcs.
And it still doing the same thing
Plz help me!!! I want it back to normal

Any one can have a ideal suggestion?
swap bcs or keep adjusting arm... or???

P.S. It is all stock, only with straigh down pipe

the gauge stops at -.007MPa(-1.01psi=-2.7inHg) when engine is off.

Idle boost: -0.067MPa
0.1MPa=14.5psi
2002 WRX stock pressure (13.5psi)!?

http://www.youtube.com/watch?v=pRwy8ZVx9OE