Radiobuttons causing full post back in atlas:controlevent trigger

[sudhaMurugesan]

Hi,
I am using Update Panel for Partial refresh of my controls. But radio button control causes full postback. Please can anyone guide or give any alternate suggestion.
I hav ddlQualification(Engg/NonEngg),rdoDegreeType(Bachelor/Master) and finally ddldegree(B.E,B.Tech/B.A,B.sc & M.E/M.sc etc)
Based on the first two selection I need to update the degree list.
Here's my Code.

<tr >
        <td>
            <asp:Label ID="Label66" runat="server" Text="Qualification Level">       </asp:Label>
      </td>
        <td>
            <asp:DropDownList ID ="ddlQualification" Width ="88%" runat="server"  OnSelectedIndexChanged="ddlQualification_SelectedIndexChanged" AutoPostBack="true"> </asp:DropDownList>
        </td>
        <td >
            <asp:Label ID="lblDegreeType" runat="server" Text="Degree Type" > </asp:Label>
        </td>
        <td ><asp:RadioButtonList ID="rdoDegreeType" runat="server" RepeatDirection="Horizontal" OnSelectedIndexChanged="rdoDegreeType_SelectedIndexChanged" AutoPostBack="true"> 
            <asp:ListItem Value="1">Bachelor</asp:ListItem>
            <asp:ListItem Value="2">Master</asp:ListItem>
        </asp:RadioButtonList></td>
    </tr>
     <tr id="trdegree" runat="server" style="color: #000000">
        <td>
            <asp:Label ID="lblDegree" runat="server" Text="Degree" ></asp:Label>
       </td>
       <td><atlas:UpdatePanel ID="UpdatePanel1" runat="server">
              <ContentTemplate>
              <asp:DropDownList ID ="ddlDegree" Width ="71%" runat="server" >
            <asp:ListItem Text="----Select----" Value="0"></asp:ListItem>
        </asp:DropDownList>
 
                                 </ContentTemplate>
            <Triggers>
            <atlas:ControlEventTrigger ControlID ="ddlQualification" EventName ="SelectedIndexChanged" />
            <atlas:ControlEventTrigger ControlID ="rdoDegreeType" EventName ="SelectedIndexChanged" />
                              </Triggers></atlas:UpdatePanel>
            </td>
        <td >
            <asp:Label ID="lblMajor" runat="server" Text="Major"></asp:Label></td>
        <td><asp:TextBox ID="txtMajor" runat="server" Width="91%" MaxLength="50"></asp:TextBox>
 
            </td>
    </tr>

Please Help me....

[sudhaMurugesan]

I found an alternate way. Instead of radio buttons i used drop down list. It works.
Many had this issue with radio buttons in update panels. careful while using it..