Text Box Change Using Listview

Dear Masters.

I created a form in which TextBox Value will change based on selection in ListBox.
Problem : I have YardNo in Colm 1 of List Box which is having duplicate value.Now when I select 1st value of duplicate Item it shows same value in TextBox. But When I select 2nd Instance of Duplicate Value it shows the 1st value in textbox. Means its not changing the values.

Attached file will give you a clear idea.

please suggest

Regards,

Vishnu