ASP.Net State Server on EC2 not connection

Question

I am trying to set up an Asp.Net State Server on Amazon EC2. The single web server using this State Server is also on EC2.

I've done the following things. I've added the IIS role on the State Server. I changed the value in the registry to allow connections for the service and started the aspstate service. I verified it is listening on port 42424 by checking netstat. I edited the web.config of the Web server to point to this server. I added the the tcp port to my EC2 security group and allowed it for all incoming ip's.

Anything else I am not doing?