Tds on salary

We have a default coming in F.Y 2010-11 in 24Q -Q4. While downloading the default from NSDL their is showing the correction in Q3. In default detail the data is related to Q3 month. where showing the late payment interest amount & paid amount for interest on delay. at the end of sheet tax liability is zero coming. i cannot understand why the default is coming & what should be do. should be revised Q4 return or Q3 or anything which should be done.