LogConfigurationException: Invalid class loader hierarchy.

Hi, I'm trying to write plugin that uses ApacheHttpClient from jersey-apache-client.
When I run plugin on Intellij Idea Ultimate 11 i get an error
INFO: Detected intellij major version 11; activating the appropriate compatibility mode.
java.lang.ExceptionInInitializerError
    at com.sun.jersey.client.apache.ApacheHttpClient.createDefaultClientHander(ApacheHttpClient.java:188)
    at com.sun.jersey.client.apache.ApacheHttpClient.<init>(ApacheHttpClient.java:96)
   ....
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed. (Caused by org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.)
    at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:397)
    at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
    ... 93 more
Caused by: org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.
    at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:385)
    ... 94 more

I removed from the classpath commons-logging, but error is still there.
When i run the same plugin in Intellij Idea Comunity edition there is no error.
Could this be influence of some other plugin? If yes, how to disable it?
Thanks