Server Error in '/' Application.

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Line 33:         r = new Regex("<!-- bodytext -->(.+?)<!-- /bodytext -->", rgx_opt);
Line 34: 
Line 35:         string bodytext = r.Matches(src)[0].Groups[1].Value;
Line 36:         bodytext = bodytext.Replace(">edit<", "><");
Line 37:         bodytext = bodytext.Replace("[", "");

[ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Parameter name: i]
   System.Text.RegularExpressions.MatchCollection.get_Item(Int32 i) +2053878
   gmukfeeder.Page_Load(Object sender, EventArgs e) in d:\hshome\chillydk\googlemapsireland.com\gmukfeeder.aspx.cs:35
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627