Hi experts,

I just flew what I thought was going to be a perfect flt(IAD-ATL) using ASA(no violent wind shifts), AC descended at TD as advertised, FMS said 'drag required'(it was).

Intercepted the LOC for 27R at 2700, approach selected, LOC and GS in PFD, GS at top-moved to center, gear down, BUT the alt hold light never went  out, alt hold NEVER disengaged.

Any thoughts? This is not my first flt in the 757.
And the another company 767 works fine.

Thanks in advance.

Jack S.
:'(