CruiseControl.Net modification check datetime parse error

everytime cruise control checks for TFS modifications, we get the following error:

BUILD EXCEPTION
Error Message:  System.FormatException: Die Zeichenfolge wurde nicht als gültiges 
DateTime     erkannt. bei System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi,
DateTimeStyles styles) bei    
ThoughtWorks.CruiseControl.Core.Sourcecontrol.VstsHistoryParser.ParseChangeSet(StringBuilder 
changeSet) bei ThoughtWorks.CruiseControl.Core.Sourcecontrol.VstsHistoryParser.Parse(TextReader 
vstsLog, DateTime from, DateTime to) bei 
ThoughtWorks.CruiseControl.Core.Sourcecontrol.Vsts.GetModifications(IIntegrationResult from, 
IIntegrationResult to) bei 
ThoughtWorks.CruiseControl.Core.Sourcecontrol.QuietPeriod.GetModificationsWithLogging
(ISourceControl sc, IIntegrationResult from, IIntegrationResult to) bei 
ThoughtWorks.CruiseControl.Core.Sourcecontrol.QuietPeriod.GetModifications(ISourceControl 
sourceControl, IIntegrationResult lastBuild, IIntegrationResult thisBuild) bei 
ThoughtWorks.CruiseControl.Core.IntegrationRunner.GetModifications(IIntegrationResult from, 
IIntegrationResult to) bei 
ThoughtWorks.CruiseControl.Core.IntegrationRunner.Integrate(IntegrationRequest request)
Project:    JW.Consumer.DB
Date of build:  2011-03-01 08:56:13
Running time:   00:00:01
Integration Request:    Build (IfModificationExists) triggered from continuous

Force build works well. We use TFS 2010 and CC.Net 1.6 Our ccnet.config looks like this:

<sourcecontrol type="vsts" >
  <server>http://tfsserver1:8080/tfs</server>
  <project>$/ProjectXy</project&g开发者_高级运维t;
  <workingDirectory>C:\WorkingDir</workingDirectory>

  <cleanCopy>false</cleanCopy>
  <autoGetSource>true</autoGetSource>
  <force>true</force>
  <deleteWorkspace>false</deleteWorkspace>
</sourcecontrol>

<triggers>
  <intervalTrigger name="continuous" seconds="300" buildCondition="IfModificationExists" initialSeconds="30" />
</triggers>

Does anybody know a solution?

My guess is there's bug with different date format (there are some bugs still open with no reply).
Try to modify date & time system regional settings.

HTH