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error configuring task list

Feb 28, 2009 at 2:22 PM
I have installed the tool and after the first time, when I try to configure again the form setting for a task list the following erro rise:

Error in edit handlerSystem.FormatException: Input string was not in a correct format.
   at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   at System.Int32.Parse(String s)
   at EditingEventWP.EditingAction.ItemUpdating(SPItemEventProperties properties)


Il I try to restore the default setting the following error rise:

An item with the same key has already been added


How to proceed?
Thanks in advance for  your answer
Fausto