Getting Timed out Error in Classic ASP While Calling XMLHTTPRequest

I'm getting an error when calling a method of an ASP.NET MVC controller from Classic ASP using XMLHTTPRequest.

msxml3.dll error '80072ee2'
The operation timed out
/createpaymentlink_ajax.asp, line 198

As I debugged the whole code the method calling is going to an ASP.NET MVC controller, but it's taking time to get output from database and before getting that response, I am facing this timeout issue in classic ASP.

function getHTML (strUrl)
      Dim xmlHttp 
      Set xmlHttp = Server.Createobject("MSXML2.ServerXMLHTTP.3.0")
        xmlHttp.SetTimeouts 600000, 600000, 15000, 15000
        xmlHttp.Open "GET", strUrl, True
        xmlHttp.SetRequestHeader "Content-Type", "application/xml; charset=UTF-8"
        xmlHttp.SetRequestHeader "Accept", "application/xml; charset=UTF-8"
        xmlHttp.Send          
        If xmlHttp.waitForResponse(90) Then 
            http_response = xmlHttp.responseText 
        End If      
        getHTML = "COMPLETED"
        set xmlHttp = Nothing       
    end function

I'm currently using this code to call method from classic ASP. I've also tried to added SetTimouts and waitForResponse as well.

Can anyone please help me ?