M157 increasing boost problem Help ..

I am tuning a m157 2014 cls63s. I have tuned many amg 55 series car using ecm titanium . Using Zeitronix ndash to log Rpm Load IAT Boost timing AFR etc.
I have tuned many simple cars w hptuners and always had good results. Tuning this cls63 i cant get boost to increase past 12 psi . I hooked up my logging equip w external o2 sensor and logged . Cant get past 12 psi of boost . If somebody is willing to help , I am not cheap for your time willing to offer some $$$. Everything is perfect just NEED MORE BOOST LOL! Thanks , Brian

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Hit me up

That file looks almost stock, worse actually. I'm sure veeefour, can hook you up, but if you're like me and you prefer to do it yourself, I attached what my first attempt would be.
Your eng is basically like mine so it seems pretty easy.
From there you can add even more boost, but I'd want to see what this nets before adding more.

Attachment 144634