Facing issue in downloading excel from ALV GRID

Hi ABAP GURU,

                         I have create ALV grid using class CL_SALV_TABLE.So here is my problem. Whenever I try to download ALV details to EXCEL, up to 60,000 rows its downloading correctly but after that one column of the excel sheet shifted to the right by filling a column with a BLANK spaces. Please let me know the reason for the same and suggest for any other alternative o solve this problem.