login feature

Referring http://vktechnalysis.com

I am trying to develop the login system with payment, by using plugins of Login With Ajax, Theme My Login and Paid Memberships Pro.
However, it does not come all right when i try to link all into a complete system of registration, payment and login.

Please advise if anyone is expert in this area. thanks.
My website : http://login3.pasolinks.com/