Facing difficulty in parsing xml response in qt

Hi...
I am developing a facebook application in qt. In the middle i am getting a response from server like below:
{session_key:XXXXX", "uid:XXXXX", "expires:0", "secret:XXXX", "sig:XXXX}

I was tried to parse using xml parsers in qt, but i couldn't succeeded. Can some one help how to parse the above response in qt( i want to get the values of session_key,secret).

sorry the exact response was just like below:

{"session_key":"XXXX","uid":XXXX,"expires":0,"secr et":"XXXX","sig":"XXXX"}

found answer. oops!. the above response is not in xml format, its a json response format i have used qtscriptengine class to parse it.