hey cooliters

i have a small problem concerning rowselect in a selectionModel.
When i click a row in the gridpanel i use a function OnEvent="RowSelect".

Now the problem is that onEvents keeps firing the function "RowSelect" after i have clicked a row.

This is my selection model :

                                        <ext:RowSelectionModel ID="RowSelectionModel1" runat="server" SingleSelect="true">
                                                <RowSelect OnEvent="RowSelect" Buffer="250" >
                                                    <EventMask ShowMask="true" Target="CustomTarget" CustomTarget="#{SouthPanelPersonID}" />
                                                        <ext:Parameter Name="personID" Value="this.getSelected().id" Mode="Raw" />
And this is my RowSelect function :

Public Function RowSelect(ByVal sender As Object, ByVal e As AjaxEventArgs)
        MsgBox("this keeps popping up instead of only once", MsgBoxStyle.OkOnly, "Warning")
        Return False
    End Function
in this case the message box keeps popping up