Consuming a web service in C# from Java client, can't detect classes

Question

I'm trying to consume a web service written in C# in VS from a java client in Eclipse. In my controller I try to call a method from one of the classes written in C#. My problem is that it seems like the classes can't be detected, how can I solve that?

First time working with these kinds of projects, so you'll have to excuse a somewhat poor explanation. Posting code to make it somewhat easier to understand

Heres one example, it says that "Customer can't be resolved to a type"

// CUSTOMER
    public void populateCustomerTable() {
        Customer[] customers = null;

        try {
            customers = proxy.getCustomers();
        } catch (RemoteException ex) {
            ex.printStackTrace();
        }

        broCodeFrame.getCustomerTable().addCustomerBatch(customers);
    }

I've made sure that the Web Service Client is updated, but seems to do nothing.