Cannot reach SSRS reporting URL from LAN Machine

I am trying to run a new instance of SSRS on a server.  I run all sql instances from a client machine connected to the same LAN.  When I try to set up reporting server and then browse to the web service and report manager URLs I get an error saying "The underlying connecation was closed:  An unexpected error on cured on a send"  If I try to go the same site on the server it prompts me for credentials and then gives me the same error.  What is the best way to remedy this?

Thanks