i want to make some child products

[sorabh]

hey m new here to use virtuemart.m getting some proms while using it . i installed it correctly, i created 4 product categories, named a,b,c,d.then there was option of products and i created around 30 products in different categories. all are looking right on front end. but what i have to do when i want to make some child products (say x,y,z, child of those 30 products) i made it by child products option but they are looking on 30 products page not on the child page.
eg.

let A,B,C main categories
let M,N,O are the products .
Let  x,Y,Z are the child products of M.
A-> M->X Y Z (i want this)
but i am getting this (A-> M X Y Z).

Please help me out from this issue.