ITR 3 excel-TDS b/fd could not be filled

In ITR 3 excel utility, I have encountered one serious error. In Schedule  TDS, section TDS 2-18C1 "Details of Tax Deducted at Source (TDS) on Income [As per FORM 16A issued by Deductor(s)]",  the  System does not allow to enter data in columns 5 and 6 viz. “Unclaimed TDS brought forward (b/f)”. These columns are shaded in grey. If I do not fill up these columns, I will lose Rs.8,000. I will wait for JSON utility, if I cannot solve it.

Does anybody face a similar problem?. Thanks