Help please stuck with code 2C57
 

My Mini cooper R56, 2010 , N-18 engine stuck with 2C57 Code
I have read another topic about 2C57 code and I did everything as list below :

1. Changed Diverter Valve
2. Changed Pressure Converter
3. Changed Vacuum pipes (#1 from vacuum pump and #2 Waste gate)

I already tested wastegate flapper with bore scope at vacuum pressure @ 15" and it close as normal

My next plan is change both VANOS solenoid.

I need a suggestion from everyone to help me solve this problem