Sysprep error after clone in vmware

I am trying to do sysprep /generalize after make a clone of virtual machine on vmware ESXi5, and got this error

2012-05-04 17:57:29, Error      [0x0f0082] SYSPRP LaunchDll:Failure occurred while executing 'C:\Windows\System32\inetsrv\iissyspr.dll,IIS_Generalize', returned error code -2146893818
2012-05-04 17:57:29, Error      [0x0f0070] SYSPRP RunExternalDlls:An error occurred while running registry sysprep DLLs, halting sysprep execution. dwRet = -2146893818
2012-05-04 17:57:29, Error      [0x0f00a8] SYSPRP WinMain:Hit failure while processing sysprep generalize internal providers; hr = 0x80090006

Tried this http://support.microsoft.com/kb/929828

Tried to change the key 

 GeneralizationState into 7

but still got the same error.