error message 13 ( type mismatch) while creating fvu file correction mode for q4 fy-0708

Dear Sir,
I had deposited tax for fy -0708 ( f24,q4) but I huv to add one more challan ,
for that i opened my original file in RPU 1.6 in correction mode and providing
the 15 digit provisional number and added one challan in challan update mode,
also added the deductee in annexure-1 and saved the file .
Now , while creating fvu file i am getting this message
MSG00000 : 13 : Type mismatch
when I make it ok
i get this message Error in writing challan detail .

kindly help

s c swami
[email protected]
9425382306