How to update the Test Step status using the SpiraImportExport webservice reference

Hi SpiraTest Support,

I would like to know, how can I update the status of a Test Step inside a Test Case using the webserice reference.

Currently I am able to get the list of test steps in a test case and its associated atributes like Test StepID , Test StepDescription ,etc.

//to retrieve list of test cases
                RemoteTestCase[] rtcList = spiraExport.TestCase_RetrieveByTestSetId(automatedTestRun.TestSetId.Value);
                int? a = rtcList[0].TestCaseId;
                int b = a.Value;
                //RemoteTestStep[] rtst =  rtcList[0].TestSteps ;
                try
                {
                    RemoteTestCase remoteTestCase = spiraExport.TestCase_RetrieveById(b);
                    RemoteTestStep[] remoteTestSteps = remoteTestCase.TestSteps;
                }
                catch (Exception)
                {

                    throw;
                }

Any help is appreciated.

Thanks,
Satyabrata Saha