SharePoint 2010: Error after starting User Profile Synchronization Service

After starting the User Profile Synchronization Service in SharePoint 2010 Central Administration, I got the error information in SharePoint log: 14\Logs.

04/05/2011 17:07:29.90  w3wp.exe (0x0A68)                        0x0648 SharePoint Portal Server       User Profiles                  et8j High     UserProfileServiceUserStatisticsWebPart:LoadControl failed, Exception: System.IO.FileLoadException: The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)     at Microsoft.Office.Server.UserProfiles.UserProfileConfigManager.InitializeIlmClient(String ILMMachineName, Int32 FIMWebClientTimeOut)     at Microsoft.Office.Server.UserProfiles.UserProfileConfigManager..ctor(UserProfileApplicationProxy userProfileApplicationProxy, Guid partitionID)     at Microsoft.SharePoint.Portal.WebControls.UserProfileServiceStatisticsWebPartBase.LoadControl(Object sender, EventArgs e) 4f29e8c7-5048-4810-aa24-7917c11a84ed
04/05/2011 17:07:29.90  w3wp.exe (0x0A68)                        0x0648 SharePoint Portal Server       User Profiles                  et8j High     UserProfileServiceAudienceStatisticsWebPart:LoadControl failed, Exception: System.IO.FileLoadException: The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)     at Microsoft.Office.Server.UserProfiles.UserProfileConfigManager.InitializeIlmClient(String ILMMachineName, Int32 FIMWebClientTimeOut)     at Microsoft.Office.Server.UserProfiles.UserProfileConfigManager..ctor(UserProfileApplicationProxy userProfileApplicationProxy, Guid partitionID)     at Microsoft.SharePoint.Portal.WebControls.UserProfileServiceStatisticsWebPartBase.LoadControl(Object sender, EventArgs e) 4f29e8c7-5048-4810-aa24-7917c11a84ed
04/05/2011 17:07:29.90  w3wp.exe (0x0A68)                        0x0648 SharePoint Portal Server       User Profiles                  et8j High     UserProfileServiceImportStatisticsWebPart:LoadControl failed, Exception: System.IO.FileLoadException: The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)     at Microsoft.Office.Server.UserProfiles.UserProfileConfigManager.InitializeIlmClient(String ILMMachineName, Int32 FIMWebClientTimeOut)     at Microsoft.Office.Server.UserProfiles.UserProfileConfigManager..ctor(UserProfileApplicationProxy userProfileApplicationProxy, Guid partitionID)     at Microsoft.SharePoint.Portal.WebControls.UserProfileServiceStatisticsWebPartBase.LoadControl(Object sender, EventArgs e) 4f29e8c7-5048-4810-aa24-7917c11a84ed

I checked the services below and found they are running well:

Then I follow the blog below and reset IIS on this server, everything is working well now.

http://www.khamis.net/blog/Lists/Posts/Post.aspx?ID=28