Unable to write config file. CHMOD 777 on the folders /data/ and /back

[Connie]

I discovered myself there was something strange going on with the domain name. I was unable to add pages at mywebsite.org.uk, but adding pages seemed no problem at www.mywebsite.org.uk

so this is a question of your domain's configuration

if you want that both URLs, without or with www.-subdomain will work the same, your hoster's support can configure that ( or not, than you have to remember to use the domain with www. ;=) )

Cheers, Connie