moving a whole arc spline by its extremities

Hi,

I have a spline ( front plane ) which I need to move entirely without deform; I move it by its 2 extremities coincident to a perpendicular plane ( plane1 // right plane )

When I move the plane1 the point of the spline dont move so how to make them unlocked to there coordinate ?

I've tried to lock the handles but without success ...

Thanks by advance

SolidworksSketching