FileHelperEngine CSV Datetime Comparison Error

Question

I am getting an datatime error conversion when I load the csv file through filehelperengine. Could someone help me. Review screen shot below. The format in my csv file 12/5/2015

[FieldOptional]
[FieldNullValue(typeof(DateTime), "1/01/1000 00:00:00")]
private DateTime mperiodStart;

public DateTime periodStart
{
get { return mperiodStart; }
set { mperiodStart = value; }
}

[FieldOptional]
[FieldNullValue(typeof(DateTime), "1/01/1000 00:00:00")]
private DateTime mperiodEnd;

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