Cant mark my forums as read

[Divvy]

Hello guys,

Im having some problems in my vbuletin 4.2.1
I put my login details and cant login... appears a message that login was successfully but is not. But If I refresh my index I see my username logged. The same to new topics... I read but is not marked as read, I need always to do a refresh to update thread status.
And when I click "Mark Forums Read", nothing happens... What could be?

htaccess problems? Can you please check mine to see if everything is fine?

# Comment the following line (add '#' at the beginning)
# to disable mod_rewrite functions.
# Please note: you still need to disable the hack in
# the vBSEO control panel to stop url rewrites.
RewriteEngine On

# Some servers require the Rewritebase directive to be
# enabled (remove '#' at the beginning to activate)
# Please note: when enabled, you must include the path
# to your root vB folder (i.e. RewriteBase /forums/)
#RewriteBase /

#RewriteCond %{HTTP_HOST} !^www\.yourdomain\.com
#RewriteRule (.*) http://www.yourdomain.com/forums/$1 [L,R=301]

<IfModule pagespeed_module>
ModPagespeed off
</IfModule>

RewriteRule ^((urllist|sitemap_).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]

RewriteCond %{REQUEST_URI} !(admincp/|modcp/|cron|vbseo_sitemap|api\.php)
RewriteRule ^((archive/)?(.*\.php(/.*)?))$ vbseo.php [L,QSA]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !/(admincp|modcp|clientscript|cpstyles|images)/
RewriteRule ^(.+)$ vbseo.php [L,QSA]

P.S. I have ModPagespeed off because was causing some problems in my forum and I disabled.

Waiting for your help, thank you guys!

Kind regards,
Tim

--------------- Added [DATE]1444156748[/DATE] at [TIME]1444156748[/TIME] ---------------

I think that the problem is with Mod_Pagespeed, because if I remove that line, the problem disappears. hmm... Im trying to disable that module because Im having problems with attachments, when the popup opens, appears blank.

Does anyone have a solution for me please?

Thanks!