Okay. Let's walk through this:
1. You have reuploaded the files in ASCII.
2. You have no MODs.
3. You have upgraded.
Any of these correct?
2. I have several.
3. Upgraded to what?
Ta for the help guys.
I will also give you some background.
Forum has been working fine. I installed Subblack3d and wanted to set it as default, except I had no 'configuration' link, like the instructions told me. I created this topic.
My host moved servers and we decided to park my forwarding domain. 'cubers.cyberscore.net/forum/phpBB2/' became 'cubers.co.uk/forum/phpBB2/'. Cookie problems arose, I needed to change the route in the 'configuration' link. I don't have one.
Now when someone is on cubers, if they close the window which the forum is loaded in, or load a new page ontopof the forum, when they return it tells them to log in.
Sometimes users can't even log in, when they type in their username and password it takes them to the homepage.
The problem has developed since I created this topic.