FSX-SE PMDG MD-11 IRS wont stay aligned

[EFRAIN 3]

Hello all, for some unknown reason my PMDG MD-11 is not aligning the IRS, when im the gate / parking will show aligned after a few but after entering the flight plan, push back and start taxiing for some reason the IRS will request to be aligned again, any ideas why this happen? thanks.

PMDG MD-11 FSX-SE

[vc10man 732]

If you post this question in the PMDG/MD-11 Forum, you are far more likely to get a lot of helpful answers.

Just out of interest, how are you powering the MD-11 while at the gate? GPU, or APU?