"initialization of rapidminer fails with new r-extension"

hi,

after importing the r-extension with the last update, Rapidminer does no longer start up.

I use Ubuntu 10 and start Rapidminer in a console with the home directory like this:

java -Drapidminer.home="/home/dude/rapidminer/rapidminer/lib" -Xmx2500M -jar rapidminer.jar

when I set the active-parameter in the extensions.xml to false, Rapidminer starts up correctly.

The error msg is:

2010-12-05 19:47:22 CONFIG: Loading operator documentation from jar:file:/home/dude/.RapidMiner5/managed/rmx_r-5.0.2.jar!/com/rapidminer/resources/i18n/OperatorsDocR.xml. (OperatorDocBundle$XMLControl.newBundle())
Exception in thread "main" java.lang.NoSuchMethodError: com.rapidminer.io.process.XMLTools.getUniqueInnerTag(Lorg/w3c/dom/Element;Ljava/lang/String;Z)Lorg/w3c/dom/Element;
at com.rapidminer.operator.r.ROperatorFactory.readFragment(ROperatorFactory.java:189)
at com.rapidminer.operator.r.ROperatorFactory.readROperatorFragments(ROperatorFactory.java:136)
at com.rapidminer.operator.r.ROperatorFactory.<init>(ROperatorFactory.java:110)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
at java.lang.Class.newInstance0(Class.java:372)
at java.lang.Class.newInstance(Class.java:325)
at com.rapidminer.tools.OperatorService.parseOperators(OperatorService.java:309)
at com.rapidminer.tools.OperatorService.parseOperators(OperatorService.java:255)
at com.rapidminer.tools.OperatorService.registerOperators(OperatorService.java:229)
at com.rapidminer.tools.plugin.Plugin.registerOperators(Plugin.java:408)
at com.rapidminer.tools.plugin.Plugin.registerAllPluginOperators(Plugin.java:595)
at com.rapidminer.tools.OperatorService.init(OperatorService.java:188)
at com.rapidminer.RapidMiner.init(RapidMiner.java:385)
at com.rapidminer.gui.RapidMinerGUI.run(RapidMinerGUI.java:208)
at com.rapidminer.gui.RapidMinerGUI.main(RapidMinerGUI.java:527)


Can anyone tell me what's wrong?

regards,
RapiDude