NHibernate - Commit Doesn't Always Work but No Error Thrown -

I have a strange problem while making changes to NHibernate, it does not cause any errors, but only 20% change for the database Have been done. I know that it looks like a strange question and you will not be able to help a lot without code, but I was wondering what is the best way to debug it. Thank you for your advice Thank you

Without any other description, I would like to diagnose it and / Or I can recommend using it. / P>