使用modalpopup时，ajax calender＆autocompleteextender不起作用

I have created panel exists with one form to add details using formview, I have one button to open popup just above to that formview. In my form I used ajax calender, autocompleteextender for textbox in formview. I used list method to autocompleteextender in .cs code not web service to get values from database. Its working properly, but the problem is when i open main panel then calender, autocompleteextender does not work, but when i open popup in that panel & close that popup calender & autocompleteextender works properly. I want it to work when i makes main panel visible, how it will be possible in my case? Please help me? Thanks.I have created panel exists with one form to ad