Hi,.. I have used the Jsecure without any problem initially. However, yesterday I thought of changing the password (I forgot that it doesn't accept numerical) and now I am not able to access to the backend of joomla. It shows this when I try to enter into the back end

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

I tried asking my host service provider to revert to the backup version but it did'nt solved the problem. Could anyone please kindly guide me from gainning the access to the backend of joomla. Thank You.