Abandoned Quest Problem

I am having trouble with some custom quests after one has been abandoned it cannot be picked up again, but this seems to only be for a few. I have a feeling its an easy fix but I am just not sure what causes it. Any help would be appreciated.

Can you post example quests? A way to reproduce the problem?

insert into `quest_template` values ('27721','2','80','80','0','0','0','0','0','0','0','25316','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','76','2','0','0','0','0','0','0','0','0','0','0','0','0','0','0','690','Warchief\'s Command: Mount Hyjal!','Speak to Cenarion Emissary Blackhoof','All able-bodied members of the Horde are hereby ordered to report to Emissary Windsong.$B$BOur brothers in the Cenarion Circle report that Deathwing\'s minions have launched a destructive offensive against the world tree and threaten to burn it to the ground!$B$BSpeak with Cenarion Emissary Blackhoof in Orgrimmar. Blackhoof is located at the tauren district in the Valley of Wisdom in Orgrimmar.$B$BOnward,Destiny calls!','','','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','','','','','1');

This is an example, not really sure how to reproduce it, however have tried it on multiple different accounts and it works for some and not others after being abandoned. I even went in to make sure there were no other relating quests in the accounts.

I have seen this happening with a little quests. Its happening with non repetible quests about all.Maybe its a core issue…

I am not thinking so, it has worked for a long time and suddenly it stopped.