The issue can be resolved by specifying the CommandName="Select" in the linkbutton. Here is an example:
<telerik:GridTemplateColumn DataField="Timekeepername"
HeaderText="Timekeeper Name" UniqueName="NameLFM"
SortExpression="Timekeepername" SortedBackColor="Transparent" >
<ItemTemplate>
<asp:LinkButton ID="lblTimekeeperName"
runat="server" Width="120px"
Text='<%# DataBinder.Eval(Container.DataItem,"TimekeeperName")%>'
CommandName="Select" />
</ItemTemplate>
</telerik:GridTemplateColumn>