Invalid Action error MS Dynamics CRM 4.0

I got the Invalid Action error when trying to open Microsoft CRM 4.0.

Event Type: Error
Event Source: MSCRMKeyGenerator
Event Category: None
Event ID: 18949
Date: 18/1/2010
Time: 11:45:19 πμ
User: N/A
Computer: W2003VL-TEST
Description:
Current active key (KeyType : CrmWRPCTokenKey) is expired. This can indicate that a key is not being regenerated properly. Current Active Key : CrmKey(Id:f1a02af2-2ed4-de11-a055-0003ffd84353, ScaleGroupId:00000000-0000-0000-0000-000000000000, KeyType:CrmWRPCTokenKey, Expired:True, ValidOn:11/18/2009 10:41:41, ExpiresOn:12/21/2009 10:41:40, CreatedOn:11/18/2009 10:41:41, CreatedBy:NT AUTHORITY\NETWORK SERVICE. Key Setting :

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Problem solved by starting Microsoft Asynchronous service. Read at http://nishantrana.wordpress.com/2008/06/11/invalid-action-error-microsoft-dynamics-crm-40/#comment-1538