Add a test event handler (which would fire after a minute if a terrain packet hadn't been acked) to scene to handle the OnUnackedTerrain event, which currently just resends the terrain patch. The idea of this packet tracking is for the region level application to be able to know if the client stack gave up on sending a packet.
!!!IMPORTANT NOTE!!! This code snippet provided as an example of coding functional content with region modules. As of 13/3 2008 this module actually renders all regions within the instance unusable if enabled by dragging the dll from ./bin to global /bin. So, use at own peril and in dedicated instance. Peace.