Dataset Error

This is my API:

http://staging.ticketgoose.com/bookbustickets/services/TGSWS?wsdl i want getTripList from this webservice


i add web reference and add this code in default.cs,

protected void Button1_Click(object sender, EventArgse)

{

TGTravelServiceService ts = new TGTravelServiceService();

var data = ts.getTripList("[email protected]", "samerafi", "72", "71", "21/05/2012");

GridView1.DataSource = data.stationList;

GridView1.DataBind();

}

in design page i put 1 button and write this above shown code, in default.aspx gridview source code i write this code:

<EmptyDataTemplate>No Records Found ! ! !</EmptyDataTemplate><Columns>

<asp:TemplateField HeaderText="userId">

<ItemTemplate>

<asp:Label ID="lbluserId" runat="server" Text='<%#Eval("userId") %>' ></asp:Label>//what i want to give here ? {this one userId or [email protected] } </ItemTemplate >

</asp:TemplateField>

<asp:TemplateField HeaderText="pwd">

<ItemTemplate>

<asp:Label ID="lblpwd" runat="server" Text='<%#Eval("pwd") %>' ></asp:Label>

</ItemTemplate >

</asp:TemplateField>

<asp:TemplateField HeaderText="originStationId">

<ItemTemplate>

<asp:Label ID="lbloriginStationId" runat="server" Text='<%#Eval("originStationId") %>' ></asp:Label>

</ItemTemplate >

</asp:TemplateField>

<asp:TemplateField HeaderText="destinationStationId">
<ItemTemplate>

<asp:Label ID="lbldestinationStationId" runat="server" Text='<%#Eval("destinationStationId") %>' ></asp:Label>

</ItemTemplate >

</asp:TemplateField>

<asp:TemplateField HeaderText="travelDate">

<ItemTemplate>

<asp:Label ID="lbltravelDate" runat="server" Text='<%#Eval("travelDate") %>' ></asp:Label>

</ItemTemplate >

</asp:TemplateField>

</Columns>

it shows empty no records found in output, What i do ? pls provide me solution ?