Hi Guys 

I my website i have 2 dopdownlost i want when i change the value of one.. The other one loads data depending on the first one value

 the both of the dropdownlists is in ajax update panal and i do have script manager

i used this code but not working 

    protected void floor_ddl0_SelectedIndexChanged(object sender, EventArgs e)
    {
        floor_ddl1.DataBind();
    }

but not workign any clue ??