http://blogs.msdn.com/nikola/archive/2008/03/13/calling-web-services-and-accessing-ui-from-timer-event-in-silverlight.aspxIf you try accessing UI from a timer event, you'll Exception: Invalid cross-thread access . This happens because the timer code is running on different thread and trying to access controls on the main thread. Here's how to fix it: Edit: thanks to jackbonden-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/nikola/archive/2008/03/13/calling-web-services-and-accessing-ui-from-timer-event-in-silverlight.aspx#8676916Tue, 01 Jul 2008 16:11:56 GMT91d46819-8472-40ad-a661-2c78acb4018c:8676916More ways to turn Internet feeds into TV feeds &laquo; Jon Udell<p>PingBack from <a rel="nofollow" target="_new" href="http://blog.jonudell.net/2008/07/01/more-ways-to-turn-internet-feeds-into-tv-feeds/">http://blog.jonudell.net/2008/07/01/more-ways-to-turn-internet-feeds-into-tv-feeds/</a></p> http://blogs.msdn.com/nikola/archive/2008/03/13/calling-web-services-and-accessing-ui-from-timer-event-in-silverlight.aspx#8897097Tue, 26 Aug 2008 14:56:26 GMT91d46819-8472-40ad-a661-2c78acb4018c:8897097Jakob<P>Damn... THANK you so much for this post... I saved my day.</P>http://blogs.msdn.com/nikola/archive/2008/03/13/calling-web-services-and-accessing-ui-from-timer-event-in-silverlight.aspx#9700641Fri, 05 Jun 2009 05:28:36 GMT91d46819-8472-40ad-a661-2c78acb4018c:9700641Develop with Smile<p>Dalam presentasi MACO selanjutnya, saya akan membawakan materi tentang Data-Driven Services in Silverlight</p> http://blogs.msdn.com/nikola/archive/2008/03/13/calling-web-services-and-accessing-ui-from-timer-event-in-silverlight.aspx#9918539Fri, 06 Nov 2009 12:14:10 GMT91d46819-8472-40ad-a661-2c78acb4018c:9918539Ruth<p>Thank you for this post - super useful :o)</p>