ISSUE WITH ALV

HI EXPERTS,

I AM FACING A CRUCIAL PROBLEM IN THE ALV GRID.I HAVE A PARTICULAR COLUMN THAT IS THE PART OF ALV TREE(node relationship) AND THE OTHER COLUMNS ARE RELATED TO THE FIELDCATALOG OF THE ALVGRID.

THE PROBLEM I AM FACING NOW IS WHEN I TRY TO DOWNLOAD TO EXCEL FORMAT USING THE EXCEL BUTTON IN THE APPLICATION TOOLBAR THE COLUMNS ONLY RELATED TO ALVGRID IS GETTING DISPLAYED AND NOT THE COLUMN FOR THE ALV TREE GETS DOWNLOADED

WHAT SHOULD BE DONE SO THAT MY ALV TREE'S CONTENT GETS DOWNLOADED.THANKS IN ADVANCE.