V2src12 error on filing st-3

I have have filed service tax return for Half Year Oct to March 2014.The returned is filed but there is an error showing on return i.e. "V2SCR12" Challan of H1 not in data base. I have paid service tax for all the six months along with interest by a single Challan.In the return I have entered CIN only once for all 6 months? 

Do I have to enter same CIN for different months with respective amounts? 

How do I rectify V2SRC12 error?