Infinite Login Loop

[deen1982]

Hello all,

We recently started getting login problem in our board. Even if the user gets logged in, they get logged out randomly when they navigate.

To put more detail, here it is:

Step1: User fills credentials and clicks "Log in"
Step 2: User gets redirecting screen with message, "Redirecting.. Thank you for logging in, user"
Step 3: Forum returns to login page again.

I browsed through possible solutions and nothing worked out.
Here is the most suggested solution:
settings- options- Cookies and HTTP Header Options :
Session Timeout = 1200
Path to save cookies = '/'
Cookie Domain= (blank) or ".domainname.com" (tried both, didn't work)

[PS: changing skin from Zen Heat to Default lets user inside the board, but again logs out while navigating through forum]

This login loop is infinite and user traffic is drastically falling, any help is much appreciated.