Haoming,I do not think this is the right place to ask this question. If you are asking a Flex question, you should try here:http://forums.adobe.com/community/flexTom

Sounds like you need to make sure that everything has its own port number.  You can't listen (for instance) on port 8400 if you application server is also listening there.Tom

As Scott mentioned, you want to have the "datasource" annotation at the model level, not the entity level.  In the next release of Data Services (or if you are using ADEP now), you can have per-entity datasources, but not in LCDS 3.1.Tom

How about the Flex and FlashBuilder forums:  http://forums.adobe.com/community/flex

Rao,If you followed the documentation on how to enable RDS in the web.xml, FlashBuilder should give you a reasonable error.  Ensure that you have configured  RDS in FB with the correct application root (it defaults to /lcds) where you have data services deployed on yout application server.Tom

Hari,If you are having Flash Builder problems, this probably isn't the place to find help.  This forums is for discussion of LiveCycle Data Services, which is a server product.Sorry.Tom

Sorry about that!The generator probably should have caught that and thrown a meaningful error.  Can you post an FML entity snippet that reproduces the problem?  We can take a look at making this better in the future.Tom

Here is a good (if older) example from Christophe Coenraets  http://coenraets.org/blog/2008/05/insync-automatic-offline-data-synchronization-in-air-using-lcds-26/It shows the network status monitoring.Tom

You should establish an event handler on the DataService channel object that will get called on the CONNECT event.Something likethe following:channel.addEventListener(ChannelEvent.CONNECT, channelConnectHandler);And have a function defined that re-executes fills if needed:public function channelConn...

Hello,You are missing the swc resource bundle libraries, which can be found along with the rest of the LCDS Actionscript libraries in lcds\resources\lcds_swcs\FlexSDK4\frameworks.  Specifically you need the files in the "locale" directory on your link line in Flash Builder - fds_rb.swc and fiber_rb....