SSIS ETL does not pick the file from Share point when it execute through SQL Agent job

I have created one SSIS packages, which pick the file from the Share point document library. its work successfully, once it execute through the VS project application. 

But when i create a job in SQL Server Agent for this package then it does not pick the file and job getting fail. 

Just for more update, SQL Server has been install in Cluster mode and using BIDS 2012 with SQl Server 2012.