Unable to add new forums in forums plugin

I am struggling to get the forums plugin to work on my website. I have installed it and added the required code to a page, but when I click on the ' click here to add new topic' it just reverts to my home page without presenting anything else.

I have tried disabling all other plugins but this hasn't made any difference. I have also tried changing themes but the same problem occurs.

I am using the esplanade theme.

Thanks in advance