issues in calling a custom report from Form in R12

Hi,

we have a custom form from which we submit a custom report using below command, it's working fine in 11.5.10.2,

http://<ebiz-host>:8015/dev60cgi/rwcgi60?AMDEV_APPS_NO_DESFORMAT&report=XXINT_FILEMGMT&desformat=pdf&p_session=FE47358669137101529B2F

 now we are in the process of upgrading to R12, and i am trying to follow the steps in (http://www.oracle.com/technetwork/database/migration/frm10gsrw10g-132606.pdf)

http://<ebiz-host>:8015/reports/rwservlet?AMDEV_APPS_NO_DESFORMAT&report=XXINT_FILEMGMT&desformat=pdf&p_session=FE47358669137101529B2F

but i am getting page cannot be found. any pointers on how to resolve, or working sample code would be helpful.