Won't Stay Logged In - Help!

[leanbulk]

Alright, so for awhile we have been having trouble figuring out why the members wont stay logged in to our forums. I have been to a couple forums that will literally keep you logged in for months, if not longer. You actually run into problems when trying to log out. It won't let you unless you reset your cookies and such. Is there a hack for this? If so, I would love to be shown where it is at.

Anyways, before I installed vbulletin 3.7 gold (previously vbulletin beta 3) I was having trouble staying logged in, but it would atleast stay logged in for a day or so. Now, every single time the browser is closed the user is logged out. I have been having quite a few complaints, and was wondering if anyone had any ideas. The following hacks are installed on the boards:

Advertise Page 1.0

Auto Database Backup 2.12

FlashChat Integration 3.52

GAB 2.0.2

Geek Auto-Linker 6.0.8

Global announcement 1.0.0

Guest Tracking 1.16

Inferno vBShout 1.0.1 Lite

iTrader 2.0.1

Limited Guest Viewing 1.0.6

Lv vB Event Forums 3.3

Members who have visited the forum 4.41

Members Who Registered Today 1.0.1

Payment Before Registration Options 1.0

Separate Sticky and Normal Threads 1.0.5

Smilies in Quickreply 3.6.x

User CP Referral ID 1.0.1

Usergroup Color Bar 1.0.0

vB.Sponsors 2.0.0

vBExperience 3.7.8

vBExperience Level 1.0

vBGuides: Seasonal Effects 1.0.0

vBSEO 3.1.0 vBulletin SEO

vBSEO :: Sitemap Generator 2.1

vBSkinZone - Simple Ad Management 1.0

Welcome Headers 4.2.2

Yet Another Mass Private Message System 1.0.1

Thanks for the help guys!