Mvat return q3 dec 16

I am facing error while MVAT Return uploading for Q3 Dec 16.

1. Amount in Form 231 Box 13C(a) must less than or equal to amount in Form 231 Box 13B(k) and greater than or equal to 0.

2. Amount in Form 231 Box 13C(b) does not match with diff of amount in Form 231 Box 13B(k) and Form 231 Box 13C(a)

I checked serval times for above details all are correct in returns. Did somebody is facing same like above error. How to rectify this error.

I tried with help line but no response.