Dashboards web service config file set up

I am new to dashboards and want to understand, how do we make a web service connection to the dashboard?

We previously had the web services set up and never got a chance to set it up, but now there is a need to set it up in our own machines.

The issue exactly being faced right now is:

we tried setting up the web service config file and it works when we execute it ( i.e. I get a URL) but it comes as

http://localhost:2910/QueryService.asmx

which we tried using as  " http://localhost:2910/QueryService.asmx?wsdl " in the dashboard connection manager and i am able to get the methods (runSQLQuery etc).

When trying to see the dashboard in the bo Infoview, we get the below error:

To access external data, add a Cross Domain policy file  to the external data web server.

Please help me in understanding the issue and significance of all these things.

Any help would be appreciated.

Thanks,

Khushboo