Export to Excel

Hello experts,

I have created button EXPORT_TO_EXCEL(using version VC 7.0). Formula and compilation/deploy is working fine. When I click EXPORT_TO_EXCEL button in portal it opens a window and processing (portal processing circle as mentioned waiting)

  I referred below link.

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/47fe4fef-0d01-0010-6f87-ed8ecb479123

Please suggest me any one what is the issue?

Thanks.