Google Analytics Experiment Causing 403 Error

Hi there,

When I set up a google analytics experiment to split test two pages, this error is displayed on the page:

‘tailoredathleteclothing.com 403 Forbidden Error Page If you arrived here due to a search or clicking on a link click your Browser’s back button to return to the previous page. Thank you. IP Address: XX.XXX.XX.XXX’

Does anyone know what is causing this and how I can make the split test work normally?

Site – tailoredathleteclothing.com (I have ended the experiment as I need to drive traffic to these pages so have to have them working!)

Any help much appreciated!

All the best,
Harry