Calling Java Web Service from .Net that uses List<T>

I'm developing a Java web service that will be consumed by .Net clients. The service exposes a method that accepts an object as an argument, this object has a field of type List, the Row class also has a field of type List.

Now when as Java client consumes this service it correctly sees the types as List however when a .Net client consumes the service I end up with the call expecting an array of arrays of type Value (e.g. Value[][]) instead of List.

The version compatibility has been set to ".Net 3.5/METRO 1.3".

Does anyone know how I can get this to work the same with .Net and Java clients in that they accept List instead of Value[][]?

Cut down versions of the web service are:

Service:

    @WebService(serviceName = "Test")
    public class Test {

    @WebMethod(operationName = "DataRequest")
    public DataResponse DataRequest(DataRequest req) {
        return new DataResponse();
    } 

}

DataRequest:

public class DataRequest {
    public DataType datType;
    public String source;
    public List<RowInfo> rows;
    public String loginId;
}

RowInfo:

public class RowInfo {
   public List<Value> valueList;
}

Value:

public class Value {    
    public String name;
    public String value;
}

On my .Net client when I try and build the request object it sees the rows field of FeeDataRequest as Value[][] instead of List.

The service reference in .Net has been configured so that the collection type is System.Collections.Generic.List.

Any idea on how to make .Net sees this correctly?