RDLC Export to PDF Not working with dynamic column header

Question

Hi, 

 

I have one RDLC report  which working fine with dynamic column headers. Few column headers are chnaged with existing column. When I run that report it woking fine but when I am trying to export that pdf, that dynamic column shown 1st header column all over the pdf.

 

It should be show as per column value chage on report.