How to register tan with nil return

I have a different problem while registering as Deductor as New User. I have filed a Return for a TAN of 26Q1 - 2012-13 as NIL RETURN and 26Q2 has three challans each with one Deductee. When I am registering it is directly asking details for 26Q1 - 2012-13 since i can't give any challan No, Challan Amount and any Deductee details as it is NIL RETURN. Now please find a way out to register the tan. I have tried quoting 26Q2 details also - it say says INVALID DETAILS.