Your guess exactly correct that its not ReadOnly mode, yes its Enabled property, I forgot it
I set this ENABLED property in layout at ViewContaoinerUIElement
But, as a quick trial just now I tried already SET_READ_ONLY, but stll not working, I mean, scroll bar is coming but when scroll down the rows are not moving down!
I will try again after couple of hrs. or ttomorrow, keep posted
Thank you