unable to install AX reporting extension AX 2012 FP?

Hi, I set up a separate box for where I installed SQL report server with SQL 2012 “SSRSBox”. the AX database in another box (“AXDB”) and AOS is installed on another box (“APP”). From APP box, I am able to connect to AXDB using AX Client. I am able to see my data and run transactions.

In SSRSBox, i configured the report server to point to AXDB. I am able to see the reportmanager url and reports URL. The AOS instance name is called “AOSAPP”

I tried to install AX reporting extensions in the SSRSbox, I got an error message - Note: I also installed SMO and CLR packages.

"An error occurred during setup of Reporting Services extensions.

Reason: The AOS server name or instance name is not correctly configured"

any idea what it could be. My AX client shows the data and its working fine. Many thanks for your help.

System.ArgumentException: The AOS server name or instance name is not correctly configured

at Microsoft.Dynamics.AX.Framework.Client.ConfigurationModel.ClientConfigurationModel.ParseAosList(String aosList, String wsdlPortList)

at Microsoft.Dynamics.AX.Framework.Services.Client.Configuration.ClientConfigurationInternal.GetClientConfiguration()

Found the problem. It is caused due to windows firewall. When I disabled the firewall, it worked.