Syntax Error (missing Operator) In Query Expression '?

I'm getting the error listed above.  To create this I used the wizard in VS2005 for the datagrid.  The delete works but not the updating.  I can't seem to find what's wrong.  In the update parameters I've removed eventID and added it, neither works.  Delete does work.  Here's the code:

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" DataSourceID="ds1" DataKeyNames="eventID">
<asp:CommandField ButtonType="Button" ShowEditButton="True" ShowDeleteButton="True" />
<asp:BoundField DataField="eventID" HeaderText="ID" SortExpression="eventID" ReadOnly="True" />
<asp:BoundField DataField="trainer" HeaderText="trainer" SortExpression="trainer" />
<asp:BoundField DataField="employeeNumber" HeaderText="Emp#" SortExpression="employeeNumber" />
<asp:BoundField DataField="area" HeaderText="Area" SortExpression="area" />
<asp:TemplateField HeaderText="Training Date" SortExpression="trainingDate">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Eval("trainingDate", "{0:M/dd/yy}") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("trainingDate", "{0:M/dd/yy}") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CheckBoxField DataField="additionalTrainerExpected" HeaderText="Addl Trainer Expected" SortExpression="additionalTrainerExpected" >
<asp:TemplateField HeaderText="Ext Trainer" SortExpression="extendedTrainer">
<EditItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" Checked='<%# Bind("extendedTrainer") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" Checked='<%# Bind("extendedTrainer") %>'
Enabled="false" />
</ItemTemplate>
<HeaderStyle Font-Names="Verdana" Font-Size="Small" />
<ItemStyle Font-Bold="False" HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="NonExt Trainer" SortExpression="nonextendedTrainer">
<EditItemTemplate>
<asp:CheckBox ID="CheckBox2" runat="server" Checked='<%# Bind("nonextendedTrainer") %>' />
</EditItemTemplate>
<ItemTemplate>
<asp:CheckBox ID="CheckBox2" runat="server" Checked='<%# Bind("nonextendedTrainer") %>' Enabled="false" />
</ItemTemplate>
<HeaderStyle Font-Names="Verdana" Font-Size="Small" />
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField><asp:SqlDataSource ID="ds1" runat="server" ConnectionString="<%$ ConnectionStrings:TrainingClassTrackingConnectionString %>"
ProviderName="<%$ ConnectionStrings:TrainingClassTrackingConnectionString.ProviderName %>"

UpdateCommand="UPDATE [trainingLog] SET [trainer] = ?, [employeeNumber] = ?, [additionalTrainerExpected] = ?, [extendedTrainer] = ?, [nonextendedTrainer] = ?, [area] = ?, [trainingDate] = ? FROM [trainingLog] WHERE [eventID] = ?">

<UpdateParameters>
<asp:Parameter Name="eventID" Type="Int32" />
<asp:Parameter Name="trainer" Type="String" />
<asp:Parameter Name="employeeNumber" Type="String" />
<asp:Parameter Name="additionalTrainerExpected" Type="Boolean" />
<asp:Parameter Name="extendedTrainer" Type="Boolean" />
<asp:Parameter Name="nonextendedTrainer" Type="Boolean" />
<asp:Parameter Name="area" Type="String" />
<asp:Parameter Name="trainingDate" Type="DateTime" />
</UpdateParameters>

<DeleteParameters>
<asp:Parameter Name="eventID" Type="Int32" />
</DeleteParameters>