DataGrid issue-Urgent

[settyv]

Hi,

I am using DataGrid control and am binding to the Dataset that is
returned from Business layer.
Now the problem is that am using hyperlink column for CaseID which is
displaying twice in the grid.
But it should not be like that.What could be the problem? Any idea.
Here is the code below:
CaseSearch.aspx

<asp:datagrid id="grdCaseSear ch" Width="800" Runat="server"
Headerstyle-BackColor="#9B9 BB4" AllowPaging="Tr ue"
OnPageIndexChan ged="NewPage" PagerStyle-Mode="NextPrev"
PagerStyle-NextPageText="N ext" PagerStyle-PrevPageText="P revious"
Font-Name="verdana" AllowCustomPagi ng="false"
AllowSorting="t rue" HeaderStyle-CssClass="table header"
HeaderStyle-ForeColor="#000 000" HeaderStyle-Font-Bold="True">
<AlternatingIte mStyle BackColor="#e2e 2e2" Font-Name="verdana"
/>
<Columns>
<asp:HyperLinkC olumn DataNavigateUrl Field="Case Number"
DataNavigateUrl FormatString="C aseInformationS ummary.aspx?Cas eN0={0}"
DataTextField=" Case Number" HeaderText="Cas e
Number"></asp:HyperLinkCo lumn>
</Columns>
</asp:datagrid>

CaseSearch.aspx .cs

Here is the method am calling :

public void DisplayCaseSear chResults()
{
DataSet ds;

SearchParams sp=new SearchParams ();

lblResultCase.V isible=true;

sp.CaseCatCode= ddlCaseCategory .SelectedItem.V alue;
if(txtToFiledDa te.Text.ToStrin g()!="" &&
txtFromFiledDat e.Text.ToString ()!="" )
{
sp.FiledTo = DateTime.Parse( txtToFiledDate. Text);
sp.FiledFrom = DateTime.Parse( txtFromFiledDat e.Text);
}

if(txtToFiledDa te.Text.ToStrin g()=="")
{
sp.FiledTo = new DateTime(0);
}

if(txtFromFiled Date.Text.ToStr ing()=="")
{
sp.FiledFrom = new DateTime(0);
}

sp.FirstName = txtFirstName.Te xt;
sp.MiddleName = txtMidName.Text ;
sp.LastName = txtLastName.Tex t;
sp.Organization = txtBusinessEnti ty.Text;

if (txtSearchCase. Text.ToString() == "")
{
if(txtCaseNo1.T ext.ToString()= ="" ||
txtCaseNo2.Text .ToString()=="" )
sp.DisplayCaseN um = null;
else
sp.DisplayCaseN um=txtCaseNo.Te xt + "-" + txtCaseNo1.Text + "-" +
txtCaseNo2.Text ;

}
else
sp.DisplayCaseN um = txtSearchCase.T ext;
//sp.DispositionD ate=DateTime.Mi nValue;
//Call BL for getting CaseSearchDatas et
Case BCase=new Case ();
BCase.SearchCas es(sp,out ds);
grdCaseSearch.D ataSource =ds;
grdCaseSearch.D ataBind();

}
Please let me know how can i solve this issue.

Thanks,
Vishnu