Try setting your text size to Smaller (default) in the Control Panel > Display.
Using larger text size results in the problems you are seeing with the airspeed on the speed tape. It might also be causing your problem with the ACE.

The ACE for the 777 for FSX will not work in P3D. The ACE for the 777 for P3D will not work in FSX. I never got the ACE working in the 777 for FSX when I had it installed in P3D. The same applies to all the ACE's in CS aircraft for FSX being used in P3D.