this is what I got when I tried to sign your guestbook essencay. the about link worked fine though.
[ArgumentException: Column 'rowid' does not belong to table guestbook.]
System.Data.DataRow.set_Item(String columnName, Object value) +100
skinners.UC_GuestBook.UpdateXMLGuestBook(Object SiteID) in C:\WebSites\Skinners\Controls\UC_GuestBook.ascx.vb:122
skinners.UC_GuestBook.btnSubmitGuestEntry_Click(Object sender, EventArgs e) in C:\WebSites\Skinners\Controls\UC_GuestBook.ascx.vb:258
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +108
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +57
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +18
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain() +1277