"System.FormatException: The string was not recognized as a valid DateTime" when running SharePoint Configuration Wizard step 9

Dears,

We have a problem upgrading sharepoint

From: SharePoint 2007 SP2 12.0.0.6535 - April 10 cumulative Update

To: SharePoint 2007 SP2 12.0.6557.5000 - April 11 cumulative Update

We start installing WSS CU in our standalone environment

Then we start running the SharePoint Configuration Wizard and it is failed in step 9 with the following error in "PSCDiagnostics" log:

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File reader could not understand line 15679. Line was: 06/26/2011 10:11:35  1  INF              Entering function PsconfigLinkLabel.LinkLabelClickedEventHandler. Error was: System.FormatException: The string was not recognized as a valid DateTime. There is a unknown word starting
 at index 24.
 
 at System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)
 
 at UlsGump.Column.TimeColumn.ParseTime(StringFacade timeString)
 
 at UlsGump.UlsEntry.SetEntryFromThread(StringFacade[] threadFacades, StringCacheFile stringCacheFile, Int64 messageLocation)
 
 at UlsGump.UlsEntry.ReadFromUlsBuffer(Char[] buffer, Int32 bufferStart, Int32 bufferCount, StringCacheFile stringCacheFile, Int64 fileStart)
 
 at UlsGump.FilePump.ReadJob()

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 Please help and advise to solve this error in order to get upgrading sharepoint succeed