Listbox multiple selections

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C#

Friends,

I am having a 2 list box control.It is having multipleselectoption to true.The value of the listboxcontrol selected item is inserted into sql table in the "Primary Impacted area"column like "ex1,ex2,ex3".In the below code it is working for first listbox control.But in "secondary Impacted area" it is not working.Please help me.

  cmd.Parameters.AddWithValue("@primaryimpactedarea",lstPrimaryImpactedArea.SelectedItem.Text);
       foreach (ListItem item in lstPrimaryImpactedArea.Items)
       {

           if (item.Selected)
           {

               try
               {
                   lblMessage.Text = lblMessage.Text + item.Text + ",";
                   cmd.Parameters[
"@primaryimpactedarea"].Value = lblMessage.Text;
               }
               catch (Exception ex)
               {
               }
           }
       }

 cmd.Parameters.AddWithValue("@secondaryimpactedarea", lstSecondaryImpactedArea.SelectedItem.Text);
       foreach (ListItem item in lstSecondaryImpactedArea.Items)
       {

           if (item.Selected)
           {

               try
               {
                   lblMessage.Text =  item.Text + ",";
                   cmd.Parameters[
"@secondaryimpactedarea"].Value = lblMessage.Text;
               }
               catch (Exception ex)
               {
               }
           }
       }