Getting 'exception has been thrown by the target of an invocation' Exception while calling a WCF method using Reflection

Question

Hi,
   I'm getting "exception has been thrown by the target of an invocation" while calling a wcf service method at the client side using reflection.
   I'm getting the exception while invoking the method at the line:
   object result = oMeth.Invoke(oProxy,@params);


Here is my service :

public string GetData(int value)
        {
            return string.Format("You entered: {0}", value);
        }

my client side code:

ChannelFactory<WcfService1.IService1> myFactory = default(ChannelFactory<WcfService1.IService1>);
            myFactory = new ChannelFactory<WcfService1.IService1>(new BasicHttpBinding(), "http://localhost:3250");
            object oProxy = myFactory.CreateChannel();           
            Type oType = oProxy.GetType();
            MethodInfo oMeth = oType.GetMethod("GetData");
            object[] @params = { 3 };
            object result = oMeth.Invoke(oProxy,@params);

Plz help if know the solution.

Thanks & Regards,
Ramana