How to set timeout API SOAP webservice ASP.NET C#

There are two applications which communicate via web service to transfer a XML.

The application "A" sends a request (Hello, I want the XML) and the application "B" creates the XML for the application A.

However the application B need sometimes 2min to create the XML and what I research so far that the web service has a standard timeout of 90seconds and application A never receives the XML.

So the developers from application A increased the timeoutto 3min (180000), see below:

public GetData GetSO(Envelope request){    try    {        HttpWebRequest client = (HttpWebRequest)WebRequest.Create(_urlGetSO);        client.Method = 'Post';        HttpWebResponse response;        client.Timeout = 180000;         // ....    }    catch (Exception ex)    {        // ...    }}        

but the problem still persists, any idea?

also we have the web.config on the aplication B side configured as below:

Well looking for all options on the side where application "B" we have the configuration for the web.config below:

<system.web><httpRuntime executionTimeout="300"/> <compilation debug="true" targetFramework="4.0"/> <authentication mode="Windows"/><pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"/></system.web>