ObjectDataSource and Guid Delete Parameter

[shapper]

Hello,

I am trying to define an ObjectDataSourc e delete parameter.
The parameter name is "TagID" and is a Guid:

ObjectDataSourc e1.DeleteParame ters.Add(new Parameter("ID",
TypeCode.Object ))

And the Delete Method defined in the ObjectDataSourc e is as follows:

[DataObjectMetho dAttribute(Data ObjectMethodTyp e.Delete, true)]
public static void Delete(object TagID)
{
CodeDataContext database = new CodeDataContext ();
Tag query = (from t in database.Tags
where t.TagID == new guid(TagID.ToSt ring)
select t).Single();
database.Tags.D eleteOnSubmit(t ag);
}

I debugged my code and the input TagID in Delete is empty.
The object is recognized as a Guid but it is empty.

And in my ListView I defined the KeyNames:
ods.DataKeyName s = new string[] {"TagID"};
ods.DataSourceI D = "ldsTags";

Justfor testing I made added a column in the ListView to display the
TagID and it is visible.

What am I doing wrong?

Thanks,

Miguel