I have a Renault Scenic 2000cc auto . After driving about 7-8 miles I hear a front knocking sound? any help?

I have a Renault Scenic 2000cc automatic year 2000 . After driving about 7-8 miles I hear a front knocking sound not related to accelerating. have had the anti-roll bar bushes changed and front spring coil and discs and pads changed as well. But the sound comes after driving certain miles? Any thoughts .Thanks|||check your CV joints mate