Steps for configuring data submission from mobile forms

Hello everybody.

Recently I've upgraded our LiveCycle installation to the ES4 and configured it to enable Mobile Forms component. Now I want to understand how to configure LiveCycle or its Mobile Forms component or maybe something else to let some servlet deployed on WebSphere Portal to collect data provided by users.

Shortly, we have a system in a production that was developed using LiveCycle ES3. Our system provides users with a PDF forms which were designed in LiveCycle Designer ES3. This PDF forms contain the button of type Submit. The button has an URL http://app_srvr_host/PdfFormParserWeb/XmlParser#FDF which is the URL to my servlet.

Now I want to keep this functionality, but using Mobile Forms capabilities. At first I saved old PDF form as XDP in LiveCycle Designer ES4, then I used the URL with 'contentRoot' and 'template' parameters and default.html profile to open my form in a browser. When I fill it and press the button I see that servlet is called but the data isn't an XML, it looks something like "_4=&_6=Talgat&_8=Karylgashov&_10=...". I've found this article LiveCycle Help | Mobile Forms Service Proxy, but I don't sure if this is the right way. Also I didn't find any detailed information about this Service Proxies, where I should deploy them (on LiveCycle server or maybe on the Application Server), what is the structure of this Service Proxies and so on.

Please let me know if I'm on the right way and this Service Proxies is only one solution for collecting data from users. And if so any detailed information about this approach would be also very appreciated. Thanks in advance.