Ok, I see your problem. Your members are correct, the link IS NOT a link. It is appearing as just text.

Thisis what they need to do:

they need to find the activation key in thier e-mail, and copy it. It will look like this:

&mode=activate&u=9&act_key=xxxxxx

They need to add that to the end of your forum url:
http://7.forumer.com/index.php?mforum=aussiexbox

so that it looks like this:
Then, thier account will be activated.

I'm sorry for this time consuming problem, and Limez is working his hardest to correct such bugs.

Majicma