I'm trying to complete the thieves guild quest line for one of my characters, I'm at the part where i'm going to be initiated as a nightingale but for some reason Karliah keeps walking away from the gate making the quest unplayable. I tried to fix this glitch by making a new character but it happened again! I don't have any unofficial Skyrim patches and i don't have any mods for thieves guild or for changing the AI in NPCs, is there a way I can fix this issue I really want to complete this quest for this character!

Download the unofficial patches for the main game plus whatever DLCs you have. If you have all the DLCs, get http://www.nexusmods.com/skyrim/mods/71316/?. The major thing you can do to make your game work properly is use the unofficial patches.

oh OK thank you, I had no idea that the patches were so vital. I'll try this and see if it fixes the problem, thanks for your help!

This didn't work sadly, she is still walking in the wrong direction hopefully you or someone else will have some more helpful ideas

Well, the next thing is to post your mods - just because you don't have TG mods doesn't mean some mod won't affect your quest....

like what mods would affect quests, like this one? Can you give me a brief list so I can get an idea on which mods i might want to reconfigure? You have been very helpful so far BTW, thanks! =D

Well, I can't give you a list, if I don't know what mods you're using. So the first thing that you need to do is list the mods you have installed.

alright it might be a pretty large list so I'll try

FNIS

New Animation for magic casting

Dance of Death

XP32 Maximum Skeleton

Celes Nightingale Armor

Immersive Armors (with body type patch)

Sovengarde Steel Armor

Player Voice Sets

Cloaks of Skyrim

Dual Wield Parrying

Familiar Faces

Alternate Start-Live Another Life

Complete Crafting Overhaul

SkyTweak

Werewolf Loot

Werewolf Perks Expanded

KS Hairdos-HDT Physics

Skyrim Enhanced Camera

Wet and Cold

Apocalypse- Magic of Skyrim

HDT HighHeels System

FileAccess Interface

Grimy Plugin

JContainers

RaceCompatiblity (with fixes)

CBBE

CBBE outfits

CB Plus Plus

Vampire Lord Retexture

Better Vampires 7.2

Moonlight Tales Werewolf and Werebear Essentials

Moonlight Tales Werewolf and Werebear Overhaul

HDT Physics Extensions

Unofficial Skyrim Patch

Unofficial Skyrim Legendary Edition Patch

Dagi-Raht Reborn

Royal Bloodline - Vampire Lord perk tree - abilities- and more

RaceMenu

BodySlide and Outfit Studio

HDT Equipment - Craftable Weapon Sling

You should really post your mod load order.

Mod load order? you mean like NMM because that's what I use to download and organize my mods.

Yes, the load order for the game. Having 2 unofficial patches will screw your game. I am interested though in the load order, did you use LOOT for sorting?

YOu can export your load order with NMM. On the plugins tab click the button underneath the green checkmark (vertical side menu).

Export it to a textfile. The unofficial patch should be installed and used from the beginning as some of the fixes when added mid game are not retroactive.

You can try a save before starting the thieves quest line.

Check out the bug section: http://www.uesp.net/wiki/Skyrim:Trinity_Restored#Bugs

oh ok thank you i'll try these options to fix the quest