Cannot handle FaultException by reflection invoking

Question

I am preparing a client for WCF service. I provoked an fault exception in some method on a service site. I mean:

throw new FaultException<sth>(new sth())

When I catch this exception in WPF appliction:

catch (FaultException<sth> ex)
{
     // something
}

everything works very clearly.

My point is, that I made a reflection on the service interface.

var type = typeof (someServiceInterface);
type.GetMethods();

and I want to catch the FaultException, when I call the method service in this way

try
{
    var singleMethod = //do sth to get method
    var result = singleMethod.Invoke(proxy, parameters);
    return result;
}
catch (FaultException<sth> ex)
{
    //1
}
catch (Exception ex)
{
    //2
}

But I catch an Exception in second catch, not in the first. The type of this Exception is "System.Reflection.TargetInvocationException". I am confused and I wonder what cause such kind of problem.