datagrid hyperlink column problem

trouble creating hyperlink 'NavigateUrl' param

code is:

<asp:HyperLink runat="server" imageurl="img/btndel.gif" Text='Delete
Login' NavigateUrl='<%# DataBinder.Eval(Container, "DataItem.PK",
"kill.aspx?t=u&id={0}")%>' ID="Hyperlink2">
</asp:HyperLink>

when run throws err :

Syntax error converting the varchar value ',' to a column of data type
int.

dataset is returning rows as desired:

PK CID LOGIN PWD CIDD AUTH
2,2 ABCD demo demo 3

What am I not doing ?
Cheers
Chris