Hi,
I installed the jSecure plugin today and didn't realize I changed the password (I forgot that it doesn't accept numerical) and now I am not able to access to the backend of joomla.

the following message appears once trying to log in to www.mysite.com/administrator/?keyword

Illegal variable _files or _env or _get or _post or _cookie or _server or _session or globals passed to script.

Can you please advice how to re-gain login to joomla admin? This is a big problem because the site is currently off and need to start it gain before tomorrow morning.

Thank you in advance,
Robert

SOLVED!

1) I moved out the jSecure plugin from plugins/system/ through FTP
2) login to Joomla back end
3) disable jSecure plugin in Joomla plugin manager
4) move back the plugin through FTP transfer
5) change keywork to alphanumerical only
6) enable plugin again in plugin manager

Now it's working as it's supposed to.

Note it is NOT AlphaNumerical it is Alphabet only.