Captured a Lord, trying to complete the guildmaster "make peace quest".

[Windows 10 is Horrible.]

The Lord is in my party as a captive. I captured him in a battle. I can't seem to put him in prison any way, yet the quest says "...you must either convince them or make sure they fall captive and remain so until a peace agreement is made".
HELP! I want that 12000 !!

[Windows 10 is Horrible.]

Here is what the Wiki says:
"Persuade lords to make peace: You will be asked to stop the war between the Guild Master's faction and another faction within 30 days. The Guild Master's faction has to be at war for this quest to be available, but in some cases this quest will exist after both factions have made peace. To complete this quest, you have to convince one named lord from each of the factions to accept a peace treaty. This can be achieved either through bribery (with the possibility of using persuasion to reduce the price), using your good relation with the lord in question as a cause to force him to accept, or by capturing him. Capturing a lord is very difficult, as he will usually escape when defeated. Bribery is a lot easier, though you will still have to find the lord first. Bribery costs 7000 for one of the lords and 1500 for the other one. The one you speak to first always seems to be the one who requires the higher sum. The reward for completing this quest is quite a bit higher than any of the other quests: 4000 experience and 12,000 denars, an improvement in your relation (+5) with the quest-giving town, and a small increase in renown."

WELL i have him in my party as a prisoner and i cant do anything with him!!

[Windows 10 is Horrible.]

Notice the:"...OR BY CAPTURING HIM" :(

[Cpt. Nemo]

Well that's just one of the lords, yes? Have you convinced/bribed/captured a lord from the other faction?

[Windows 10 is Horrible.]

The quest description says that you just have to bribe ONE of the Lords, or capture one. I trieed a ton of different things land him in jail, but no NPC even acknowledges that a Lord is in my inventory.
The quest failed.
Old games = buggy . :)

Game is still fun though.

[Cpt. Nemo]

As in, you need both lords to not object to peace, and that can be accomplished via bribery, capture, or persuasion. It's not a bug.