As reported in this (http://forums.civfanatics.com/showpost.php?p=5931781&postcount=50) and this (http://forums.civfanatics.com/showpost.php?p=5971648&postcount=1) post separately there is a bug in the AP Voting as follows:
Very early building of the AP triggers a vote for Resident. This vote is not registered (no Resident is chosen) and after that no further elections are triggered for more than a few dozens of turns (far beyond the 9 turn interval (adjusted for game speed) that should be the case). This makes any resolutions even for victory impossible. I am not sure if the entry in the change log regarding number of candidates does cover this bug, if not: here is a new one ;)

I have a save game with the same problem. I built the AP in 200 B.C. when every civ had at least one civ with Hindu in it). It is now 540 A.D. and nothing has happened besides me getting the resident vote.