Hi Saxon,

Thanks for quick reply. I am not able to post all code since it's exceeding max char limit.

So am posting  class that making callout.

 Class that makes callout:

public class TestWebServiceCallout
{
 
 @Future(callout=true)
 public Static void TestMethodWebServiceCallout()
 {
     NewqqouteLifelinkcorpComOpenflexservice.OpenFlexSoap tempSer=new NewqqouteLifelinkcorpComOpenflexservice.OpenFlexSoap();
     
     String temp='<?xml version="1.0" encoding="UTF-8" standalone="yes"?><!DOCTYPE ProposalInfoIN>'+
     '<ProposalInfoIN> <Clients> <Client> <Company> <Code>WCL</Code></Company>'+
     '<Product><Code>WCLULXM</Code></Product>'+
     '<Keyword/><Keyword id="Insured.Sex" type="normal"><Answer>M</Answer></Keyword>'+
     '<Keyword id="Insured.Age" type="normal"><Answer>25</Answer></Keyword>'+
     '<Keyword id="Insured.State" type="normal"><Answer>VA</Answer></Keyword>'+
     '<Keyword id="Insured.Class" type="normal"><Answer>QN</Answer></Keyword>'+
     '<Keyword id="FCOL.LengthGuar" type="normal"><Answer>C40</Answer></Keyword>'+
     '<Keyword id="FCOL.LengthGuar2" type="normal"><Answer>C105</Answer></Keyword>'+
     '<Keyword id="FCOL.LengthGuar3" type="normal"><Answer>C121</Answer></Keyword>'+
     '<Keyword id="Policy.FaceAmount" type="Yearly"><Yearly><Start>1</Start><End>99</End><Answer>5645445</Answer></Yearly></Keyword>'+
     '<Keyword id="Policy.PremiumMode" type="normal"><Answer>A</Answer></Keyword>'+
     '<Keyword id="FCOL.RunComparisons" type="normal"><Answer>Y</Answer></Keyword>'+
     '<Keyword id="PolicyRiders" type="normal"><Answer>N</Answer></Keyword>'+
     '<Keyword id="FCOL.PrintOpts" type="normal"><Answer>C</Answer></Keyword>'+
     '</Client></Clients></ProposalInfoIN>';
     
     NewqqouteLifelinkcorpComOpenflexservice.quoteResult_element qe=tempSer.quote(temp);
     system.debug('Result 4 -------> '+qe);
 }
}