Textbox with multiline did not push down others controls

Hello Nasko,
Thank you for reply, that is great and helped me.
but there is two issues I want to understand how can I do it:

1- I have a PageHeader in my report I want to hide some controls from it depending on the value from database ex. I have ID column, I check if the value = 1 then I hide the controls (I did conditional formatting for this) but I see that all values of ID is equal 1 (in details section that values are true)

2- I want to display arabic (indic) numbers rather than default number I choose the culture ar-SA and I added this code before rendering to PDF

System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("ar-SA");
            System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo("ar-SA");

but the report still shows the default numbers.

I need you help.

Thanks