Hi Phanikumar,
Goto the control tap of the user decision step take the standard task no given there it will be "TS00008267".
Goto PFTC transaction, Enter the above task no 00008267 and choose satandard option in dropdown.
copy it by pressing copy button, a new task no will be generated and it will be shown in message.
Use the newly copied Task in your user decision step and change the Task description in the description tap of the task.
Now you can use the container element you want in it by binding and creating in it.
Regards,
KK.