visual source safe plugin error

 Hello everyone,

I'm using Idea 14.1, and I've tried to install VSS plugin, however when it restart I get the error below.

Anyone knows how to solve this? Do I have to add any jar somewhere?

Thanks

ruca

Plugin 'SourceSafe' failed to initialize and will be disabled.  Please restart IntelliJ IDEA.

java.lang.NoClassDefFoundError: com/intellij/ultimate/PluginVerifier
    at com.intellij.vssSupport.VssVcs.<init>(VssVcs.java:102)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.picocontainer.defaults.InstantiatingComponentAdapter.newInstance(InstantiatingComponentAdapter.java:193)
    at org.picocontainer.defaults.ConstructorInjectionComponentAdapter$1.run(ConstructorInjectionComponentAdapter.java:220)
    at org.picocontainer.defaults.ThreadLocalCyclicDependencyGuard.observe(ThreadLocalCyclicDependencyGuard.java:53)
    at org.picocontainer.defaults.ConstructorInjectionComponentAdapter.getComponentInstance(ConstructorInjectionComponentAdapter.java:248)
    at com.intellij.util.pico.ConstructorInjectionComponentAdapter.getComponentInstance(ConstructorInjectionComponentAdapter.java:58)
    at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter$1.getComponentInstance(ComponentManagerImpl.java:550)
    at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter.getComponentInstance(ComponentManagerImpl.java:610)
    at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:245)
    at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:211)
    at com.intellij.openapi.components.impl.ComponentManagerImpl.createComponent(ComponentManagerImpl.java:125)
    at com.intellij.openapi.components.impl.ComponentManagerImpl.a(ComponentManagerImpl.java:116)
    at com.intellij.openapi.components.impl.ComponentManagerImpl.init(ComponentManagerImpl.java:87)
    at com.intellij.openapi.project.impl.ProjectImpl.init(ProjectImpl.java:295)
    at com.intellij.openapi.project.impl.ProjectManagerImpl.a(ProjectManagerImpl.java:319)
    at com.intellij.openapi.project.impl.ProjectManagerImpl.access$700(ProjectManagerImpl.java:82)