Re: Am I eligible for upgrade path for ACMP?
You can check this following page on ACMP. In the section Upgrade paths you can find the valid upgrade paths. It looks like as you only have the written, you can't take the upgrade path. You might have other certifications, like CWNA or CCNA Wireless which allow you to take the fast track.
If you are not completely sure, you can contact the Aruba Education Services.
If you have urgent issues, please contact your Aruba partner or Aruba TAC (click for contact details).