Problem in Dropdownlist and Linkbutton.

Question

In a page i use 6 webcontrols, 2 Dropdownlist,2 Textbox 1 Link button and i Button. In this 1 dropdown and text box visible property is false,if i select a value in 1st dropdown list,then only those both will visible... but if i select a value in 1st drpdwnlst it will bind datas into 2nd drpdwnlst. and if i press a button(no data's in onclick event) then that 2nd dropdwnlst get datas from db....

the same thing happened in link button also....please help me to resolve this...


Displays Object doesn't support this property or method -- Error..... but everything i place correctly.


please help me to resolve this.