Be pushy with Push Notification in your game: Application Manifest File
First of all, you will need to enter a Publisher name in the Properties\WMAppManifest.xml file.
Change the Publisher from two quotes to the following (carriage returns added by author), for push to work you must type in a publisher name, make something up:
<App xmlns=""
ProductID="{781a18da-40e5-40ae-82e2-e7ce9ae8e1d4}"
Title="Trailer Trash JunkYard"
RuntimeType="XNA"
Version="1.0.0.0"
Genre="Apps.Normal"
Author=""
Description=""
Publisher="Trailer Trash">
A little further down in the WMAppManifest.xml file you will see, check and make sure that the highlighted line, <Capability Name="ID_CAP_PUSH_NOTIFICATION" />
is contained under the Capabilities Tag:
<Capabilities> <Capability Name="ID_CAP_NETWORKING" /> <Capability Name="ID_CAP_LOCATION" /> <Capability Name="ID_CAP_SENSORS" /> <Capability Name="ID_CAP_MICROPHONE" /> <Capability Name="ID_CAP_MEDIALIB" /> <Capability Name="ID_CAP_GAMERSERVICES" /> <Capability Name="ID_CAP_PHONEDIALER" /> <Capability Name="ID_CAP_PUSH_NOTIFICATION" /> <Capability Name="ID_CAP_WEBBROWSERCOMPONENT" /> <Capability Name="ID_CAP_IDENTITY_USER" /> <Capability Name="ID_CAP_IDENTITY_DEVICE" /> <!--New Windows Phone OS 7.1 capabilities inserted during project upgrade.--> <Capability Name="ID_CAP_ISV_CAMERA" /> <Capability Name="ID_CAP_CONTACTS" /> <Capability Name="ID_CAP_APPOINTMENTS" />
</Capabilities>