TeamCity 3.1.2: Simplest Plugin does not starts

Hi Guys,

After some abortive attempts to run my plugin code on the TeamCity, I deside to make simplest plugin stub with hope to find the root of evil...

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package com.db.dbrox.TeamCity.Plugins.MakeReleaseLabel;

import com.intellij.openapi.diagnostic.Logger;

public class MakeReleaseLabelTab {

private final static Logger LOG = Logger.getInstance(MakeReleaseLabelTab.class.getName());

public MakeReleaseLabelTab() {

LOG.info("Hello, World!!!");
}
}
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]]>
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You can look at my builded JAR file:
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After putting this file into the c:\TeamCity\webapps\ROOT\WEB-INF\lib folder and restarting TeamCity servise nothing happens :(

I'm not see anything in log files :(