ISA Login Problem

I have installed b2b on EP6 and J2EE 6.40,

By using the url "http://cfsapep:50000/b2b/b2b/init.do"

I go the Logon screen and I enter the user id and password and I don't see anything, I have following Question

1. Do I need to use SAP User or Portal User

2. Do I need to do any config in R/3, If you have documentation for the config.

Thanks

Jagraj Dhillon