Dua is a good thing of course, but when it comes to action...my parents don't know about my convertion but they don't like the way I live - not drinking, not smoking, not going to discos, wearing modest clothing...I tried to explain some things but they go on thinking that all muslims are terrorists. So the best way out is to prove not with the words but with behaviour. when parents see that their child has become more honest, more modest,more respectful to them - may be they'll change their mind...in my case it has been lasting for a few years and they haven't changed their mind yet..So it' s a lengthy process))