Gwt doesn't work with com port rxtx
<p>com2 - it's class which work with com port ( rxtx library ).
When I run my site on gwt and press on button run this function and errors: </p>

<pre><code>public String greetServer(String input)  {


    try {
        comm2 COM = new comm2("COM3", "$KE,WR,6,1\n");
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return input;



}


  Caused by: java.lang.NoClassDefFoundError: Could not initialize class gnu.io.CommPortIdentifier
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at com.google.appengine.tools.development.agent.runtime.RuntimeHelper.checkRestricted(RuntimeHelper.java:69)
        at com.google.appengine.tools.development.agent.runtime.Runtime.checkRestricted(Runtime.java:64)
        at com.aaa.server.comm2.&lt;init&gt;(comm2.java:17)
        at com.aaa.server.GreetingServiceImpl.greetServer(GreetingServiceImpl.java:18)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:115)
        at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
        ... 34 more
</code></pre>

<p>on first run i see in error's</p>

<pre><code>Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission loadLibrary.rxtxSerial)
</code></pre>
