Gridview delete logic problem - Can anyone figure out what's wrong?

[Steve]

I have a gridview which uses an objectdatasourc e for its select and
delete.

The delete command uses the function below. The delete itself works but
the extra logic which requires parameters AccountDebitID and
AccountCreditID does not work.

'Delete a transaction

Sub deletetrans(ByV al transactionid As Integer, ByVal transactionamou nt
As Integer, ByVal AccountDebitID As Integer, ByVal AccountCreditID As
Integer)

Dim deleteaccounts As New trans
deleteaccounts. AddToAccountBal ance(AccountCre ditID,
transactionamou nt)
deleteaccounts. SubToAccountBal ance(AccountDeb itID,
transactionamou nt)

Dim transdel As New
transacsTableAd apters.Transact ionsTableAdapte r
transdel.Delete Transaction(tra nsactionid)

End Sub
The function works perfectly fine when I use it indpendently of the
gridview. But within the gridview it gives the error:

"There is no row at position 0." which is due to the value of the
AccountCreditID and AccountDebitID not being correctly passed on to the
function. So the problem lies somewhere in the gridview, but I can't
figure out what I am doing wrong.

The source for my objectdatasourc e and gridview is as follows:

<form id="form1" runat="server">
<div>
<asp:ObjectData Source ID="ObjectDataS ource1" runat="server"
DeleteMethod="d eletetrans"
SelectMethod="d isplaylast10tra ns" TypeName="trans ">
<DeleteParamete rs>
<asp:Paramete r Name="transacti onid" Type="Int32" />
<asp:Paramete r Name="transacti onamount" Type="Int32" />
<asp:Paramete r Name="AccountDe bitID" Type="Int32" />
<asp:Paramete r Name="AccountCr editID" Type="Int32" />
</DeleteParameter s>
</asp:ObjectDataS ource>
<br />
<asp:GridView ID="GridView1" runat="server"
DataSourceID="O bjectDataSource 1" DataKeyNames="t ransactionid">
<Columns>
<asp:CommandFie ld ShowDeleteButto n="True"
ShowEditButton= "True" />
</Columns>
</asp:GridView>
<asp:Label ID="Label1" runat="server"
Text="Label"></asp:Label></div>
</form>

Can anyone figure out what I am doing wrong? Why aren't the values of
AccountDebitID and AccountCreditID being passed on to the delete
function?

Thank you,

Steve.