Audi s3 AMK

Hi, I'm from France and I have an Audi S3 APY engine with 120.000Km.
One of my friends know you (TheDSI) is a french mapper.

Actually i have a problem with my car.

My config :

-K04 prepare
-Stock manifold
-Stock downpipe
-Fuel pomp high pressure
-Wagner FMIC
-Exhaust MTM
-Some Viper perf Hoses

My problem is we want 1.5b between 3500rpm to 6500rpm and after down to ~1.35b at 7000rpm.
So actually we don't have this :

-> 3500rpm to 5800 : 1.5b
-> 5800rpm to 6400 : down to 1.3b
-> 6400rpm to 7000 : ~1.35b

We don't know where is the problem because the turbo don't want to take more pressure while he can take more 1.6b stable.

MAF : ~227g/ms

If you have an idea why the turbo don't take is pressure i'm open.

Thanks you man

Quentin