Affiliate link won't redirect to signup page

I have created a white labelled site for one of my affiliates (jtanda.skillsguru.web.za) and on the sign up button on the main menu I have inserted a link to the sign up page with their affiliate referral link embedded (http://skillsguru.web.za?ref=jtanda-47/pro-site/?action=new_blog) - however this link takes the user to the home page and not the signup page, is there a way to have the affiliate link embedded but it still goes straight to the sign up page?