title: Push notification problem in Windows Phone 7
body: <p>I tried the following tutorials to create the push notification in Windows Phone 7. </p>
  
  <p><a href="http://www.sgtconker.com/2010/03/article-windows-phone-7-push-notifications/" rel="nofollow">http://www.sgtconker.com/2010/03/article-windows-phone-7-push-notifications/</a></p>
  
  <p><a href="http://www.silverlightshow.net/items/Implementing-Push-Notifications-in-Windows-Phone-7.aspx" rel="nofollow">http://www.silverlightshow.net/items/Implementing-Push-Notifications-in-Windows-Phone-7.aspx</a></p>
  
  <p>I can create the channel uri in the WP7 emulator without any error.</p>
  
  <p>However, when I post the push notification from the server to the channel uri. I could only receive the 404 error. </p>
  
  <p>Could anyone give me some help ?</p>
  
  <p>Thanks. </p>
  
  <p>=====</p>
  
  <p>Update 1 (28-Oct):</p>
  
  <p>Thank you very much for the answers.</p>
  
  <p>After I read the latest resources and sample codes, I just sent a push notification to the WP7 emulator successfully.</p>
  
  <p>The channel setup part in WP7 does not change much in the latest SDK.</p>
  
  <p><strong>The problem that I encountered before was from the POST message part of the sender.</strong></p>
  
  <p>The following website is quite useful. </p>
  
  <p><a href="http://www.thisisfanzoo.com/Blog/JeffF/archive/2010/08/02/a-really-long-post-about-the-windows-phone-7-push.aspx" rel="nofollow">http://www.thisisfanzoo.com/Blog/JeffF/archive/2010/08/02/a-really-long-post-about-the-windows-phone-7-push.aspx</a></p>
  
  <p>He shows how to correcty build the POST message and it is very critical. </p>
  
  <p>Also the channel uri that created before will expire, when the WP7 emulator (handset) turns off over an hour. Hence, we need to keep track of the channel uri and update the server once it changes.</p>
  
  <p>Have a nice day.  </p>
  
  <p>=====</p>
  
  <p>Update 2 (28-Oct):</p>
  
  <p>I just created the POST message using cURL in Linux server, and successfully delivered it to the WP7 emulator by push notification.</p>
  
  <p>Text encoding like ASCII-UTF-8 conversion issue was fixed too.</p>