How to solve CruiseControl.net Error: "Type with NetReflector name "versionLabeller" does not exist."

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.NET

I just installed CruiseControl.NET with subversion edge, but I cannot start up the
CruiseControl.NET Server service in MS Management Console. The ccnet.log file reports as follows:

2015-01-10 12:25:04,845 [4:DEBUG] The trace level is currently set to debug.
2015-01-10 12:25:04,892 [4:INFO] CruiseControl.NET Server 1.8.5.0 -- .NET Continuous Integration Server
2015-01-10 12:25:04,892 [4:INFO] Copyright © 2003 - 2014 ThoughtWorks Inc.  All Rights Reserved.
2015-01-10 12:25:04,892 [4:INFO] .NET Runtime Version: 2.0.50727.3662 Image Runtime Version: v2.0.50727
2015-01-10 12:25:04,892 [4:INFO] OS Version: Microsoft Windows NT 5.2.3790 Service Pack 2 Server locale: English (United States)
2015-01-10 12:25:04,892 [4:INFO] Reason: SCM start
2015-01-10 12:25:06,173 [4:DEBUG] [FileChangedWatcher] Add config file \'d:\\Program Files\\CruiseControl.NET\\server\\ccnet.config\' to file change watcher collection.
2015-01-10 12:25:06,189 [CCNet Server:INFO] Reading configuration file \"d:\\Program Files\\CruiseControl.NET\\server\\ccnet.config\"
2015-01-10 12:25:09,439 [CCNet Server:DEBUG] [FileChangedWatcher] Add config file \'d:\\Program Files\\CruiseControl.NET\\server\\ccnet.config\' to file change watcher collection.
2015-01-10 12:25:09,611 [CCNet Server:WARN] Configuration does not have any version information - assuming the configuration is for version 1.8
2015-01-10 12:25:09,845 [CCNet Server:ERROR] A fatal error occurred while starting the CruiseControl.NET server
2015-01-10 12:25:09,939 [CCNet Server:ERROR] Exception:Unable to instantiate CruiseControl projects from configuration document.
    Configuration document is likely missing Xml nodes required for properly populating CruiseControl configuration.
    Type with NetReflector name \"versionLabeller\" does not exist.
    The name may be incorrect or the assembly containing the type might not be loaded.

    Xml:
<pre lang="XML">
<labeller type="versionLabeller" svnUri="https://MySite/svn/Group1" svnPath="/trunk/Project1" svnUsername="builder" svnPassword="xxxxxxx" />

Conflicting project data :

<project name="Group1.Project1 - 1_Dev" queue="Group1.Project1">
	<category>Group1.Project1</category>
	<sourcecontrol type="svn">
		<autoGetSource>false</autoGetSource>
		<username>builder</username>
		<password>xxxxxxx</password>
		<trunkUrl>https://MySite/svn/Group1/trunk/Project1</trunkUrl>
	</sourcecontrol>
	<labeller type="versionLabeller" svnUri="https://MySite/svn/Group1" svnPath="/trunk/Project1" svnUsername="builder" svnPassword="xxxxxxx" />
	<tasks>
	<!-- Build the project -->
	<nant>
		<baseDirectory>D:\Program Files\CruiseControl.NET\server\Build</baseDirectory>
		<buildFile>versions.build</buildFile>
		<buildArgs>"-D:BuildsRootDirectory=D:\Builds" "-D:SVNRepository=https://MySite/svn/Group1" "-D:SVNPath=/trunk/Project1" "-D:SVNUsername=builder" "-D:SVNPassword=xxxxxxx"</buildArgs>
		<targetList>
			<target>Build</target>
		</targetList>
	</nant>
	</tasks>
	<publishers>
		<merge>
			<files>
				<file>Target\Reports\NUnit\UnitTestReport.xml</file>
				<file>Target\Reports\FXCop\FxCopReport.xml</file>
				<file>Target\Reports\PartCover\CoverageReport.xml</file>
				<file>Target\Reports\MSBuild\BuildLog.xml</file>
				<file>Target\Reports\SourceMonitor\*-Details.xml</file>
				<file>Target\Reports\SourceMonitor\*-Summary.xml</file>
				<file>Target\Reports\Build\Files.xml</file>
				<file>Target\Reports\Build\BuildInfo.xml</file>
			</files>
		</merge>
		<xmllogger />
	</publishers>
	<triggers>
		<urlTrigger url="http://MySite/markers/Group1.Project1" seconds="30" />
	</triggers>
</project>

---> Exortech.NetReflector.NetReflectorException: Type with NetReflector name "versionLabeller" does not exist.
The name may be incorrect or the assembly containing the type might not be loaded.