Hi Badrun,
If you are following This Link to set up ODK Aggregate on Google App Engine, there shouldn't be any problem. However, please walk through this guideline and if you come across any issues, please post the specific points of issues you are experiencing including any error message during the setup process.
I would request if you find any response helpful on this forum, please do not forget to let us know once your problem has been resolved, as that becomes a reference for others. Also, you can share your experience, you have managed to overcome that issue.
Thanks,
Imran