Excel download throwing Time out error

Hi Experts,

We have followed SCN Document 46001 for downloading table data to excel in WebDynPro.

Download/Write contents in .xlsx file in SAP Web Dynpro

It is working fine in case of small amount of data (Say 1000 records with 44 columns) where as when I am trying to download the

table with 10000 odd records with 44 columns it is throwing as 500 Connection time out error.

When we check it is taking time at below statement.

cl_fdt_xl_spreadsheet=>if_fdt_doc_spreadsheet~create_document(

      EXPORTING

        itab         = lref_data

        iv_call_type = 1

        columns      = lt_column

      RECEIVING

        xdocument    = lv_xstring ).

Please advice how can I rectify this issue.