could not find a non-generic method

[Bryce]

I have an ObjectDataSourc e binding a GridView, with Delete enabled. The
following is the declaration (with non-delete stuff left out to save space):

<asp:ObjectData Source ID="CatalogItem sListDataSource "
runat="server" DeleteMethod="D eleteCatalogIte m"
InsertMethod="I nsertCatalogIte m"
OldValuesParame terFormatString ="original_{ 0}"
SelectMethod="G etCatalogItemsL ist"
TypeName="Catal ogItemManager" UpdateMethod="U pdateCatalogIte m">
<DeleteParamete rs>
<asp:Paramete r Name="id" Type="Int32" />
</DeleteParameter s>
....
</asp:ObjectDataS ource>

So I've got a class that has the following function:
[DataObjectMetho dAttribute
(DataObjectMeth odType.Delete, false)]
public int DeleteCatalogIt em(int id)
{
return CatalogAdapter. DeleteItemQuery (id);
}

when it runs, it gives me the following error:
[InvalidOperatio nException: ObjectDataSourc e 'CatalogItemsLi stDataSource'
could not find a non-generic method 'DeleteCatalogI tem' that has parameters:
id, original_Id.]

which seems odd, because I selected the delete method above with a single
parameter during the ObjectDataSourc e configuration wizard.

So I created another method with two parameters that works:

[DataObjectMetho dAttribute
(DataObjectMeth odType.Delete, false)]
public int DeleteCatalogIt em(int id, int original_Id)
{
return DeleteCatalogIt em(original_Id) ;
}

Which is fine, but I'm curious why it expects two parameters when I selected
the method that has one (and the DeleteParameter s shows that I only wanted
one paramter).

Thanks