MDI Child - Parent Form

Question

I have 3 different forms.

1. Main MDI Form

2. Contacts Form

3. Find Contacts Form

I select Contacts.vb from Mainmdi.vb using Menustrip. i have set a Find Button in Contacts.vb form, which will open a form FindContact.vb. i have created Findcontact.vb from Solution Explorer by Coding. 

When i click on Find button the form appears but its not MainMDI child. See the image, and Suggest me what is solution

Here the form named Find contact is appeared in taskbar where the form named contacts does not appears in taskbar.