Sorry to sound dim here but where do you actually specify 
the 5250 As/400 connection for the Surfer . I can't quite 
understand at what point this happens from the 
documentation . At least not in the Installation . 

During the install, you are asked if you want to define any 
connections--at that time, you enter the DNS or IP address 
of your AS400 and check the "5250" box in the install 
program.

Try re-installing and specifying at that time...note that 
you may want to un-install first in order to have the 
install program prompt for the connections, as it will not 
do that for an existing installation (so that an existing 
user doesn't have the connections altered just to upgrade 
the software).

Without going through that, you can try using the Connection 
Wizard, which you access through the Web Gateway Homepage, 
loaded from the Screensurfer Folder or Start Button entry.

Note that to use the connection wizard you first need to 
start Screensurfer using the service applet also loaded from 
the Screensurfer folder--we always recommend starting in 
diagnostic mode for a new installation/new connection.