Possible hackers

Sounds like you are using a free web host and running the wrong version of web wiz forums, you need the Lite version.

With free web hosts you share the same application with all other sites on the server.

This means that if someone else is using web wiz forums on the server, you will show thier users in the active topics page and vise versa.

Also times etc. use application variables and can effect other forums on the server.

If you are using free web hosting then you need to download the Lite version.

The Lite version doesn't use application variables and has things like active users disabled so that your web wiz forums will not effect or be affected by other poeple running the same software on the server.