Views:

The following points should be checked in order;
- Resolvability of Application hostname from Client
-Client access to hostname address
-If there is any, between application server and client
a. Firewall
b. LoadBalancer
- on IIS on the server;
a. SestekNaturalDialog site
b. Sestek NaturalDialog Application Pool
- Access to media DB
If all this looks right, contact support.sestek.com.