Mvat quaterly return filling error msg..urgent help required

can anyone please help me with this...I was going to file Q3 return when I noticed that while filing Q2 return instead of carrying froward excess credit I had it as refunded, so now as I was going to revise the Q2 return before filling for Q3, I am getting this error. Eventhough the amt in respective boxes are same I cannot rectify it and there is no opng credit, if anyone knows how to solve it pls help me...

Thanks in advance