I uploaded the site from local to remote.
I can not access as an administrator, users can not
Error message:
Recent requests have been denied because contained a "token" Invalid security. Please reload the page and try again.
and signal overrides
site: www.quel.org/joomla

Solved
Required to change settings in php.ini with these values:
register_globals=Off
safe_mode=Off
allow_url_fopen=Off
allow_url_include=Off

Thanks