spec r driveshafts on xray t3

[moggy12]

i use the new version 2 spec r ecs front driveshafts on my xray t3 the problem is the wheel nuts keep coming loose ( never came loose on the original xray driveshafts )was told to use serrated wheel nuts i did this but after a few runs still came loose any one got any ideas how to stop the wheel nuts coming loose ? thanks