I found the solution by myself after long searches. To use "pubCenter" with "AdRotator", the following points should be well done:
1) Having checked the Capacities
<Capability Name="ID_CAP_IDENTITY_USER"/>
<Capability Name="ID_CAP_MEDIALIB_PHOTO"/>
<Capability Name="ID_CAP_NETWORKING" />
<Capability Name="ID_CAP_PHONEDIALER" />
<Capability Name="ID_CAP_WEBBROWSERCOMPONENT" />
2) Add reference to the Microsoft Advertising SDK
My mistake here was to have forgotten the reference to the SDK. But now everything works fine :)