Hi,
Please find the following links which will be useful to you.
http://support.microsoft.com/kb/2502671
http://support.microsoft.com/kb/2526609
http://support.microsoft.com/kb/2448885
http://social.microsoft.com/Forums/en/crmdeployment/thread/8044b86a-9668-47bb-8d7b-d18fdfbd5e0c
Thanks & Regards, MS CRM Consultant, V.Surya.