below is my code,thanks

IServerObjectConfiguration2 pSOC = null;
try
{
pSOC = pSOA.GetConfiguration(fileName.Replace(sFileBack, ""), "MapServer") as IServerObjectConfiguration2;
}
catch
{
}
if (pSOC != null)
{
//pSOA.DeleteConfiguration(fileName.Replace(sFileBack, ""), "MapServer");
continue;
}
pSOC = pSOA.CreateConfiguration() as IServerObjectConfiguration2;
pSOC.Name = fileName.Replace(sFileBack, "");
pSOC.TypeName = "MapServer";
IPropertySet pProperty = pSOC.Properties;
pProperty.SetProperty("FilePath", sNewMxdPath);
pProperty.SetProperty("OutputDir", @"F:\arcgisserver\arcgisoutput");
pSOC.IsolationLevel = esriServerIsolationLevel.esriServerIsolationHigh;
pSOC.IsPooled = true;
pSOC.MaxInstances = 2;
pSOC.MinInstances = 1;
IPropertySet pRecycleProperty = pSOC.RecycleProperties;
pRecycleProperty.SetProperty("StartTime", "00:00");
pRecycleProperty.SetProperty("Interval", "3600");
IPropertySet pInfoProperty = pSOC.Info;
pInfoProperty.SetProperty("WebEnabled", "true");
pInfoProperty.SetProperty("WebCapabilities", "Map,Query,Data");
//pInfoProperty.SetProperty("URL", string.Format("http://{0}/arcgis/services/{1}/{2}/MapServer", sServer, sServerFolder, fileName.Replace(sFileBack, "")));
pSOC.StartupType = esriStartupType.esriSTAutomatic;
pSOC.UsageTimeout = 120;
pSOC.WaitTimeout = 120;
//WMS
IPropertySet pWmsProperty = new PropertySetClass();
pWmsProperty.SetProperty("Name", "WMS");
pWmsProperty.SetProperty("Title", (sServerFolder == "" ? "" : sServerFolder + "_") + fileName.Replace(sFileBack, ""));
pWmsProperty.SetProperty("OnlineResource", string.Format("http://{0}/arcgis/services{1}/{2}/MapServer/WMSServer", sServer, (sServerFolder == "" ? "" : @"/" + sServerFolder), fileName.Replace(sFileBack, "")));
pSOC.set_ExtensionEnabled("WMSServer", true);
pSOC.set_ExtensionProperties("WMSServer", pWmsProperty);
//IPropertySet pWmsInfo = new PropertySetClass();
//pWmsInfo.SetProperty("URL", string.Format("http://{0}/arcgis/services/{1}/{2}/MapServer/WMSServer", sServer, sServerFolder, fileName.Replace(sFileBack, "")));
//pSOC.set_ExtensionInfo("WMSServer", pWmsInfo);
pSOA.AddConfiguration(pSOC);
pSOA.StartConfiguration(fileName.Replace(sFileBack, ""), "MapServer");