Hi Bende,
The Dynamics CRM app for Windows Phone 7 only supports Microsoft CRM 2011 that has Activity Feeds installed.
I hope this helps. If my response answered your question, please mark the response as an answer and also vote as helpful.
Dimaz Pramudya | CSG (Melbourne) | http://www.xrmbits.com | dimaz@xrmbits.com If this post answers your question, please click "Mark As Answer" on the post and "Mark as Helpful"