Pass Value from Parent to child

Question

i have create one MDIParent Form

this mdiform exist following items button1, Button2

if we are click on button form 1 will be displaying

that form1 form contain btNext Button if click the btNext from form1, the butoon2 (MDIForm buttom).. should be click then need to display the form2

i tried code is below

inside the BtNext button this.Close(); MDIParent1 MDi = new MDIParent1(); MDi.button2_Click(null, null);

but its not work wat is the reason

Pls

Regrad Nazarml