IniDocument intilization fails

[adlbtt]

when i try to rune code IniDocument initialization fails and throw an error like as follows

System.FormatException was caught
  Message=String was not recognized as a valid DateTime.
  Source=mscorlib
  StackTrace:
       at System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)
       at System.DateTime.Parse(String s)
       at Nini.Ini.IniDocument.ValidateUsage()
       at Nini.Ini.IniDocument..ctor(String filePath)
       at NP2012.LicenseHandler.ReadSerialNumber() in D:\AgiloSoft\NP2011Build\NP2011Build\NP2011\LicenseHandler.vb:line 249
  InnerException:

This type of Exception has been generated my code as follows

Dim Ini As IniDocument = New IniDocument(IniFileName)

In the above object  i give ini file path but it doesn't run and throw above Error I don't know why it is. To check that error I have made object of empty contructor as follows

Dim Ini As IniDocument = New IniDocument()

but still it is throwing the same error.

Please help me out to get out of this.

Thanks………

[Brent R. Matzelle]

What version of Nini are you using?  There is no "ValidateUsage" method and there isn't any date parsing either.  Is this a fork or something?