Flash xr6 turbo ba mkll

[Sirxr8]

Hi all
I have recently got my hands on a 6 speed ba mkll xr6 turbo.
It is mechanically stock but did come with an sct x3 flash tuner.
I have plugged it in and uploaded the 11psi tune and run the factory settings but there is no difference and the boost gauge still only reads 4-5psi. The flash tuner says its married and the program was downloaded as far as I can tell I have done everything right. The x3 was purchased on eBay from bpr so I'm hoping someone here can help me out.
Thanks