after i set my shopping cart with right information

from admin there is 2 payment is enabled . one is autorizenet
second is paypal

when i go to shopping cart and purchase the item everything is fine after i sign in and it desplays the the shipping details and its free shipping

i do not have button or anythings to go to step 2 or 3

shopping cart is up to date and in fresh install . notating has been modified.

please help