Flat file Schema- Validation issue


I have IS 6.1 and developed one FF Schema dictionary.
I am trying to add length validator for each field which i am extracting using Nth field extractor.

Along with length validator, i also want to use one of my formatting service for each of my field. But when i use both of these options then my length validator throws an exception even if length of the field is within limit.

If i remove my formatting service then it works fine. Can anybody please let me know what could be an issue and how i can solve it.