Basically the object existed in a state. in order to update the data grid I had to initialize(re-initialize the state). I just place the HTTPService call in the initialized state and it all works fine.
dear ,hope be fine,i have same problem as you faced.please send me or post the state initilization code where you called the httpservice so that i can have concept how to solve problem thanks alot.my email is
I cheated. I reset the array collection myarraycollection = new arrayCollection();
then loaded it and it worked.