Problem in filing form1

When Iam trying to file form 1 for a private limited company, it shows the following error message:

'Mandatory field: Numder of equity preference shares is mandatory if yes is selected in whether the company is having share capital or not field. Please enter"

Actually I entered details of equity shares and as it is a private company, it doen't have preference shares. So, kindly sujjest me what I have to do?