Nlog Logger.Info not working - nlog

Question

i have a webservice which is consumed via jquery ... now the problem is i want to put some debug into from nlog so that i can see how the flow is actually going .. i thought nlog's option for debuging ....
here is my config and code
<targets>
<target name="file" xsi:type="File"
layout="${longdate} ${logger} ${message}"
fileName="${basedir}/Logs/${shortdate}.log" />
</targets>
<rules>
<logger name="*" minlevel="Debug" writeTo="file" />
<logger name="*" minlevel="Error" writeTo="file" />
<logger name="*" minlevel="Fatal" writeTo="file" />
<logger name="*" minlevel="Info" writeTo="file" />
</rules>
and the logger class where i have given for getting debug information is
[ScriptService]
public class Service : System.Web.Services.WebService
{
Logger logger = LogManager.GetCurrentClassLogger();
[WebMethod]
public String GetAgentDetails(String AgentId)
{
logger.Info("This is webservice");
String result = string.Empty;
try
{
using (ISession session = NhibernateHelper.Opensession())
{
logger.Info("Enters Session");
var agent = GetAgent(); // Gets the agent object
result = JsonConvert.SerializeObject(agent);
logger.Info(result);
return result;
}
}
catch (InvalidOperationException ioe)
{
logger.Error(ioe.Message);
logger.Fatal(ioe.Message);
logger.Error(ioe.InnerException);
logger.Fatal(ioe.InnerException);
return null;
}
catch (Exception ex)
{
logger.Error(ex.Message);
logger.Fatal(ex.Message);
logger.Error(ex.InnerException);
logger.Fatal(ex.InnerException);
}
return result;
}
}
when accessed through the jquery script it should have written the log informations where i have written logger.info(result) but it seems no log file is created .can someone explain whats the problem ? however the same log file works for all other classes . no issues in that . if exceptions are thrown the log file gets created and log is written. but in this case for logger.info its not happening . i am using Nlog 2.0 with Asp.net 3.5 SP1 .