Hi all. I recently install the 737NGX. It flew fine fine for a while, but now, when I start from the cold and dark configuration, the red X that marks when the IRS needs the be aligned on the PFD stays, even after the IRS has been aligned. I reinstalled the 737, and started it from the default pre-configured mode, but the red X is still there. Is there something I am doing wrong?Cheers