Event 7493 - Secure Store Service every our

At 14 Hive Log there are this log entries:

·        ValidateCredentialClaims - Access Denied: Claims stored in the credentials did not match with the group claim for a group app.

·        The Microsoft Secure Store Service application Secure Store Service Application failed to retrieve credentials. The error returned was 'Access is denied.'. For more information, see the Microsoft SharePoint Products and Technologies Software Development Kit (SDK).

·        GetCredentials failed with the following exception: System.ServiceModel.FaultException`1[Microsoft.Office.SecureStoreService.Server.SecureStoreServiceFault]: Access is denied. (Fault Detail is equal to Microsoft.Office.SecureStoreService.Server.SecureStoreServiceFault).

The User from the event entry is the farm service account.

I also host the Team Foundation 2010 SharePoint site’s at this farm. I hope somebody can help me,

Horst