Hello Ali,
Follow these steps to hide section untill check box (tick box) is checked:
1. First of all insert one check box (tick box) "Field 1" into InfoPath form.
2. Insert a section "Section 1" and place all the controls you would like to show when check box (tick box) "Field 1" is checked.
3. Now double click the section "Section 1"
4. Go to Display tab in Section Properties window
5. Click on "Conditional Formatting" button in Display tab
6. Click on "Add" button in Conditional Formatting window
7. Select Check box field "Field 1" from first drop down, 'isequalto' from second drop down, "FALSE" from thrid drop down
8. Check "hide this control" check box and click on "ok" button 3 times
Now Preview the form section "Section 1" is not displayed. Check check box "Field 1", result is Section 1 is displayed
Hope this helps!