I have the same issue as you.  However, restarting my computer after each install, and going in without ACE did not help my issue.  I STILL get INVALID ENTRY for ZFW or GRW.  All systems up, IRS aligned, there should be no excuse.

Why is the entry not going in?  (In my opinion, the ACE utility should be giving the ZFW, GRW, etc).  The issue with this is that payload reads dfferently from ACE to the FS Load menu (an 850Lb difference!).