Registration point problem


ive been working on a flash movie where the registration point of an object is important and ive come across a problem. ive drawn a circle and turned it into an mc. the registration point is right in the middle of the circle. if i give the mc co-ordinates using the properties panel it places the top left corner of the mc at that point. if i give it co-ordinates using as flash uses the registration point to place the mc. why is this and is there a way around it?