Delete movieclip problem

Hi,
In my file I have used greensock transform manager class. At he same time I have used a code to generate text field at runtime which can be moved and deleted. Now the problem is that If I select the text box and then select the black box, the text box will lose its selection.Now if I delete the black box the text box will also be deleted . I don’t know why it happens every time. But if i select and delete the text box , then only the text box will be deleted, which is quite natural.
Please help me to solve this problem.

Thanks & Regards
Biswajit Roy