PROGRAM STAGE FAILING TO COMPLETE AFTER DATA ENTRY

I am using DHIS2 2.24 build 037a39f.

I have a program with 7 stages.Some stages when data is entered,they complete button accepts.While other forms about 3 of them when i click complete nothing happens.

I have checked on the properties if some of the attributes are on compulsory and unchecked those properties but nothing happens.

What could be the problem.

Thank you.

Stanley