IIS ap.net COM error iTunes

I'm trying to write an app based on my iTunes Library. I don't have any problem in dev environnement (iis or dev srver). But in prod i've got this error

Retrieving the COM class factory for component with CLSID {DC0C2640-1415-4644-875C-6F4D769839BA} failed due to the following error: 80080005 Échec de l’exécution du serveur (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE)).

Of course i'm searching and searching......

i've tryed all solution founded :

i've got full right for this acount :

• Local service
• Network service
• User
• IIS_IUSR

on this file :

• iTunes.exe

on this folder :

• App/iTunes
• Music/iTunes
• wwwroot
• sysWOW64...Desktop

And also on dcomcnfg :

• MyComputer/SecurityCOM on acces activate and exec
• DCOM configuration/iTunes on acces activate exec and config

i've put in my webconfig

<authentication mode="Windows"/>
<identity impersonate="true"/>

AppPool is on pipeline classic and i'm trying with all identity and also with 32b support enabled

..... No result

i become crazy with security stuff...

anyone have some ideas...?

thank a lot