kml - gx:Track updates and time slider in Google Earth Plugin -

my goal periodically update position of track, rendered in google earth plugin. using gwt-based web app , servlet produces kml updates. first create placemark <gx:track/> , specific id, push <create/> elements new <when/> , <gx:coord/> - similar how done here. updates fetched ge plugin , see time slider updated - time span longer each time update occurs. however, ge not show latest position, have move slider manually see recent position. there way force ge automatically? thinking of using <gx:multitrack/>, read somewhere it's not supported plugin. appreciated.. wish there more documentation on using networklinkcontrol updates <gx:track/>, i've been able find random forum posts.

why don't update time using this

        var newtime = // time/date of update         var timestamp = ge.createtimestamp('');         timestamp.getwhen().set(newtime);         ge.gettime().settimeprimitive(timestamp);