actionscript 3 - Print data from json response to AS3 label -

this json response i'm getting api, used.

 trace(loader.data);

 httpstatushandler:200  {"status":"success","data":    [{"cab_id":"101","rating_up":"4","rating_down":"4"}],"errors":""}

i need decode , print in as3 .can show mew how so.
tried this,

var mydata:object = json.decode(loader.data);  trace(mydata[1]); trace(mydata->rating_up); trace(mydata.tostring());   none working!!! help?

why don't try like

trace(mydata.data[0].cab_id); trace(mydata.data[0].rating_up); trace(mydata.data[0].rating_down);

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