Atlast finally adjusted my Dish....
At morning I got signals on weak tp on loosening the screws little bit itself....
And now lost signals on weak tp...
So now loosened the screws and moved the dish little bit. I am getting 8 only as SQ in my location Tambaram after so many tries...
As iphifi bro told my SQ got reduced to 10 from 14 in other tp channels....
But it's not an issue as I am getting all channels....
thanx everyone for the help especially shawl bro...