Hi, i have problem with application pool on IIS for dynamics AX AIF.
in yesterday, i restored database from UAT to development .
after restore, i set default website on AX , set reporting server, compile axbuild, compile full cil, and change default websites, change url on inbound port, and activate my AIF.
process compile full cil and activate aif finish successfully. and the my custom aif folder has been created on iis directory. when i hit the wsdl url in browser , i get error HTTP Error 503. The service is unavailable.
i check and i found the application pool not started. so i started the application pool, but when i refresh my iis , my application pool is stopped again.
afher that , i check my event viewer and i get the error

in event viewer i found error
Message: Duplicate type with name 'Dynamics.Ax.Application.IPMS_IcareContract' in assembly 'Dynamics.Ax.Application, Version=6.3.1000.309, Culture=neutral, PublicKeyToken=null'.
so i stop AOS, truncate table SYSXPPAssembly, delete folder xppil, run AOS, axbuild, and full compile full cil.
compile full cil is running well and not have any error and than i start my application pool again, but still same, the application pool stopped again.

and the event viewer status is still same.
Have you ever experienced anything like this ?
Thank you.