Dear porf hwang, thanks too much for help and support, your guide was helpful to me, i have just comment about trace, after you explain to me about the i set [b]connected [/b]
to [b]false[/b] i drag satellite first time work fine and trace not follow he, but when i drag for second time or more appear again that trace follow satellite to the next point i drag, how i can solve this for be can drag many times without happend it.

thanks,