ok, in this case start to look this link http://blogs.technet.com/b/configurationmgr/archive/2011/05/24/configmgr-2007-fix-unable-to-connect-to-site-database-after-it-s-moved-to-a-failover-cluster.aspx
Bechir Gharbi | http://myitforum.com/myitforumwp/community/members/bgharbi/ | Time zone : GMT+1
- Proposed as answer by Torsten [MVP]MVP Thursday, February 23, 2012 7:36 AM
Usually this problem relates to service principal names being incorrect or not set at all. Check those out.