AspectJ - why "advice defined in XYZ has not been applied"?

I just started playing with AspectJ (1.6.11). I'm sending emails via commons-email libary and I'd like to know how long it takes to send a message. So this is my email sending code:

import org.apache.commons.mail.Email;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.SimpleEmail;

public class EmailTest
{
    public static void main(String[] args) throws EmailException
    {
        Email e = new SimpleEmail();
        e.setHostName("localhost");
        e.setFrom("foo@localhost");
        e.addTo("batto@localhost");
        e.setSubject("Test " + System.currentTimeMillis());
        e.setMsg("Message");
        e.send();
    }
}

and this is my aspect:

public aspect EmailAspect
{
    private long start;

    pointcut conn() : call(* javax.mail.Transport.send(..));

    void around() : conn() {
        start = System.currentTimeMillis();
        Throwable t = null;
        try {
            proceed();
        }
        catch(Throwable _t) {
            t = _t;
        }
        long spent = System.currentTimeMillis() - start;
        System.out.println("Send time: " + spent);
        if (t != null) {
            throw new RuntimeException(t);
        }
    }
}

However when I compile it with:

java -jar ../lib/aspectjtools-1.6.11.jar -cp "$CLASSPATH" -source 6 Email*{java,aj}

I get following warning:

/home/batto/work/ajtest/test/EmailAspect.aj:8 [warning] advice defined in EmailAspect has not been applied [Xlint:adviceDidNotMatch]


1 warning

And of course aspect doesn't work. I tried before()/after() advices, different patterns in call(), but it all ended up with same warning.

I debugged the the program in Eclipse (with commons-email sources) and I know that Transport.send() gets executed.

What is the problem?

Thank you.

UPDATE

So I've just figur