[support] cron access denied

[Jim Ruby]

Hi, using the latest version of drupal 7 I can not run cron and yes I have
the key and tried from configure / cron clicking the button and also the
link to cron with the key.

I have read all sorts of things including changing permissions of cron.php
to 775, 755, 644 and nothing works. I'm wondering if I have a module causing
this problem. I am using the following modules.

I have disabled the nodeaccess module and rebuilt the permissions and still
access denied.

Backup migrate
Ctools
Entity
Entity reference
Faq
Filefieldpaths
Filefieldsources
Globalredirect
Nodeaccess
Pathauto

Pathologic
Privatemsg
Rules
Token
Views
Webform

Any suggestions on how else I can troubleshoot this and get cron working?