Sql - Configure Data Source Is Not Returning Anything?

I'm selecting table data of the current user:

SELECT [ConfidenceLevel], [LoveLevel], [HappinessLevel] FROM [UserData] WHERE ([UserProfileID] = @UserProfileID)

I have set a control to the unique user ID and it is getting the correct value:

HTML: <asp:Label ID="userID" runat="server" Text="Labeluser"></asp:Label>

C#: userID.Text = Membership.GetUser().ProviderUserKey.ToString();

I then use it in the where clause using the Configure Data Source window unique ID = control then controlID userID(fills in .text for me)

I compile and run but nothing shows up where the table should be.

Here is the code it has created:

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="SqlDataSource1">
<Columns>
<asp:BoundField DataField="ConfidenceLevel" HeaderText="ConfidenceLevel"

[Code]....