[Forum] problems with login with www and without it

[EHM]

I just realized that if I log in on my forum calling

http://www.mysite.com

the login goes just fine
if I call

http://mysite.com

I'm cant log in.
then, if I just add the www and hit enter, I'm log in.
so I'm assuming is a cookies issue.
My site has the cookies set to '/' only.

then, when I log off, it log's off, but if I just add www at the address bar, I'm log in again.
looks like cookies are not being cleared.

how to fix it?

thank you

[Andy]

Here is the fix. You want to have .htaccess to automatically change the non-www to a www url.

RewriteEngine on
rewritecond %{http_host} ^mysite.com [nc]
rewriterule ^(.*)$ http://www.mysite.com/$1 [r=301,nc]

[EHM]

I did the fix Andy suggest and was not change on the erratic behavior.
still, when a user log in, and click SUBMIT, the next screen is an error page:
Invalid Redirect URL (http://www.MySITE.com/forums/)

note that the user inicial page was http://MySITE.com/forums (no www)

What else that could be?

[Trevor Hannant]

What do you have set in AdminCP > Settings > Options > Site Name / URL / Contact Details > Forum URL? The www or non-www version of the domain?

If the non-www version, ensure that's got www in there

[Andy]

note that the user initial page was http://MySITE.com/forums (no www)

The .htaccess you created is not working. Ask your web hosting company to make the .htaccess work properly. There should never be a a condition where there is no www because the .htaccess file will immediately add the www part if .htaccess is working correctly.

[EHM]

@Trevor
I went to AdminCP > Settings > Options > Site Name / URL / Contact Details > Forum URL?
and included WWW there (wasn't ) reset the browser, try again
and still receiving this error message:
vBulletin Message

Invalid Redirect URL (http://MYSITE.com/forums/)

@Andy,
I checked with my hosting and the .htaccess is working fine.
The site resolves in either way, with or without the WWW.
it's something internal on vBulletin.
Something on the settings. but where??

[Trevor Hannant]

Can you try re-downloading the ZIP file from the Members Area and re-upload all files (except install/install.php and includes/config.php.new) making sure you overwrite all files currently on your server.

Does this resolve the problem?