ASPX form doesn't send any dropdown or listbox data

[netspace]

I am new to .net and would appreciate some advice.
All of the form results are sent, except the DropDownList and ListBox.
code is;
<asp:DropDownList id="Hear_About_Us" Tabindex="85" runat="server">
<asp:listitem Text="Select one" value="Select_one" />
<asp:listitem Text="Direct Mail" value="Direct Mail" />
<asp:listitem Text="Networking" value="Networking" />
<asp:listitem Text="Trade Show" value="Trade Show" />
<asp:listitem Text="Web Search" value="Web Search" />
<asp:listitem Text="Established Client" value="Established Client" />
<asp:listitem Text="Other" Value="Other" />
</asp:DropDownList>

<asp:DropDownList id="product_use_1" runat="server">
<asp:listitem Text="Select one" value="Select_one" />
<asp:ListItem Text="Trade Show" value="Trade_Show" />
<asp:ListItem Text="Special Event" Value="Special_Event" />
<asp:ListItem Text="College/School" Value="College/School" />
<asp:ListItem Text="General Use" Value="General_Use" />
<asp:ListItem Text="Other" Value="Other" />
</asp:DropDownList>

I guess I am missing something but Expressions doesn't help much.

[MrMancunian]

So, where's the part that sends the values? This doesn't tell us anything. Show us the part that handles the sending and we can give it a try.

Steven