Sales document number not appearing in Work Item.

Hello gurus,

     I have created a WorkFlow for approval of Sales order. My problem is, the sales document number is not appearing in the WorkItem for user decision task. I am passing container variable the sales document number in the Parameter1 of the User Decision task of the work flow. Value is populated correctly in the container variable for sales document number, but fails to appear in the work item content in SBWP.

     Please suggest a solution.

Regards,

Dnyanesh.