Hi, it's impossible...you've to store data on server using server side scripts..
OR:
use Write2File.sis application...see some other thread in this FlashLite forum
like this one:
Saving
http://www.macromedia.com/cfusion/webforums/forum/messageview.cfm?catid=472&thre adid=938417&highlight_key=y&keyword1=Write2file