Hi Vijay,
If all the configuration steps are correct and still you are facing this issue then follow the below steps.
1) Stop the JAVA system
2) Login into JAVA system at OS level and go to the folder like below
" /usr/sap/SID/J00/j2ee/os_libs"
then rename the file "adssap" "adssap.org"
portal system need to start again and the file adssap will generate automatically. Issue will be resolved
For more help for issue and trouble explained in SAP NOTE: 944221 - Error analysis for problems in form processing.
ADS configuration steps.