request.querystring error

[Grunt]

I downloaded a custom control from here:
http://www.codeproject.com/aspnet/dwtabstrip.asp

it was written in c#, but I have the compile dll so it should work fine in vb...

Imports doug.Components
Partial Class Main
    Inherits System.Web.UI.Page

    Public OurId As String

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Try
            OurId = Request.QueryString("pjID")
        Catch ex As Exception
            OurId = "0"
        End Try

        Dim tabFusion As New TabList
        Dim tabMain As New Tab
        tabMain.DisplayName = "Main"
        tabMain.DisplayPosition = 0
        tabFusion.AddTab(tabMain)
        tabMain.URL = "FusionMain.aspx?pjID=" & OurId

        Dim tabAdd As New Tab
        tabAdd.DisplayName = "Add"
        tabAdd.DisplayPosition = 1
        tabFusion.AddTab(tabAdd)
        tabMain.URL = "AddTicket.aspx?pjID=" & OurId

        Dim tabSearch As New Tab
        tabSearch.DisplayName = "Search"
        tabSearch.DisplayPosition = 2
        tabFusion.AddTab(tabSearch)
        tabMain.URL = "Search.aspx?pjID=" & OurId

        Dim tabReport As New Tab
        tabReport.DisplayName = "Report"
        tabReport.DisplayPosition = 3
        tabFusion.AddTab(tabReport)

        Dim tabLogOut As New Tab
        tabLogOut.DisplayName = "LogOut"
        tabLogOut.DisplayPosition = 4
        tabFusion.AddTab(tabLogOut)

        tabFusion.TargetFrame = "pageview"

        'add tabfusion to the placeholder to define
        'its location
        Me.plcTabHolder.Controls.Add(tabFusion)

        If Request.QueryString("seltab").Length = 0 Then
            tabFusion.SelectedTab = 0
        Else
            tabFusion.SelectedTab = Convert.ToInt32(Request.QueryString("seltab"))
        End If
    End Sub

i am getting an object not set to an instance of an object on the if request.querystring line.

here is the code for the control that was used in the articel demo:

	public class Tabs : System.Web.UI.Page
	{
		protected doug.Components.TabList TabList2;
		public string ourID;

		private void Page_Load(object sender, System.EventArgs e)
		{

			try
			{
				ourID = Request.Querystring["pjID"];
			}
			catch
			{
				ourID = "0";
			}

			doug.Components.Tab myTab = new doug.Components.Tab();

			#region Tab1
			myTab.DisplayName = " Project Home ";

			myTab.DisplayPosition = 0;

			myTab.URL = "projectHome.aspx?pjID=" + ourID;

			TabList2.AddTab(myTab);
			#endregion

			#region Tab2
			doug.Components.Tab myTab2 = new doug.Components.Tab();

			myTab2.DisplayName = " Consultants ";

			myTab2.DisplayPosition = 1;

			myTab2.URL = "prjConsultants.aspx?pjID=" + ourID;

			TabList2.AddTab(myTab2);
			#endregion

			#region Tab3
			doug.Components.Tab myTab3 = new doug.Components.Tab();

			myTab3.DisplayName = " Contact List ";

			myTab3.DisplayPosition = 2;

			myTab3.URL = "prjContactsList.aspx?pjID=" + ourID;
			
			TabList2.AddTab(myTab3);
			#endregion

			#region Tab4
			doug.Components.Tab myTab4 = new doug.Components.Tab();

			myTab4.DisplayName = " Documents ";

			myTab4.DisplayPosition = 3;

			myTab4.URL = "projectDocs.aspx?pjID=" + ourID;
			
			TabList2.AddTab(myTab4);
			#endregion

			#region Tab5
			doug.Components.Tab myTab5 = new doug.Components.Tab();

			myTab5.DisplayName = " Country B Plan ";

			myTab5.DisplayPosition = 4;

			myTab5.URL = "uplCountryBPlan.aspx?planType=1&pjID=" + ourID;
			
			TabList2.AddTab(myTab5);
			#endregion

			#region Tab6
			doug.Components.Tab myTab6 = new doug.Components.Tab();

			myTab6.DisplayName = " Non Country B Plan ";

			myTab6.DisplayPosition = 5;

			myTab6.URL = "uplCountryBPlan.aspx?planType=0&pjID=" + ourID;
			
			TabList2.AddTab(myTab6);
			#endregion

			#region Tab7
			doug.Components.Tab myTab7 = new doug.Components.Tab();

			myTab7.DisplayName = " Budget ";

			myTab7.DisplayPosition = 6;

			myTab7.URL = "Budget.aspx?pjID=" + ourID;
			
			TabList2.AddTab(myTab7);
			#endregion

			#region Tab8
			doug.Components.Tab myTab8 = new doug.Components.Tab();

			myTab8.DisplayName = " Action Steps ";

			myTab8.DisplayPosition = 7;

			myTab8.URL = "actionSteps.aspx?pjID=" + ourID;
			
			TabList2.AddTab(myTab8);
			#endregion

			if (Request.Querystring["seltab"].Length == 0) 
			{
				TabList2.SelectedTab = 0; 
			}
			else 
			{
				TabList2.SelectedTab = Convert.ToInt32(Request.Querystring["seltab"]);
			}
		}

Can anyone give me some insight as to why I am getting that error?