WHMCS PLUGIN NOT WORKING

Hello I am trying to connect whmcs to my wordpress website but it does not seem to be working.

My ulr for whmcs is http://tryweb.co/member

when I type that in it does not except the /member part. I really want this to work.

Please I need this resolved ASAP

Also once it is working does it integrate with worpress users or is it separate.

I want to create a few pages on the worpdress website that need a subscription user type so all my whmcs clients will automatically be also able to have an account on my wordpress website. without having to set up two accounts.