Problem with setProperty

first have a look at this:
http://pastebin.com/387350

It loads “auto” coordinates from php file, and makes the “auto” move after timeinterval. It is needed tht it could load infinate coordinates, but i fail to do it. If u change setProperty(auto, _x, kord ) to setProperty(auto, _x, x2 ) , it works, but as u can see only with one coordinate.