Date range using Field Validation module

Hi,
I'm using a profile2 profile for registration which has a date field, which needs to be validated for age. I am using field validation module to validate the date field. I need to validate the field for age restrictions. I have entered maximum and minimum values in global format. It is display the custom error to each and every entry I make to the field (Date of birth). I have attached the screenshot for further information. Can anyone help acheiving this.