Query Output Data missing in SSIS output file

I created a SSIS package which writes all data from a table to csv file. But in the output file the column data for a few rows is not found, which is visible when a select is run on the table in SSMS.

My database is on a cluster instance of SQL Server 2008 R2 Enterprise Edition 64-bit with SP2. Windows cluster is running onWindows 2008 R2 Enterprise 64 bit with SP1.