whmcs integration login does'nt work

When you go to the WHMCS page, then click on link/page that requires you to be logged in, it kicks you back to the login page and never authenticates the user.

For example, you can go to the WHMCS link at the top, then clientarea. When I try to log in with my test account it won't log in. It works on the regular whmcs site.

Also, I cannot add products on the order page.