jNetStream Protocol Decoder

I am using version 0-2-4 and am trying to use a filter. I simply want to filter on a packet that has a tcp dest port of 80. The following does not seem to work. Any ideas?

import com.slytechs.jnetstream.system.RuntimeEnvironment;
import com.voytechs.jnetstream.codec.Decoder;
import com.voytechs.jnetstream.codec.Linker;
import com.voytechs.jnetstream.codec.Packet;
import com.voytechs.jnetstream.codec.filter.Filter;

public class FilterTest {

public static void main(String[] args) {

try {
new FilterTest();
} catch (Exception e) {
e.printStackTrace();
}
}

public FilterTest() throws Exception {
Decoder decoder = null;
decoder = new Decoder("test.pcap");
String filterExpression = "TCP.dst==80";
Filter filter = new Filter(filterExpression, (Linker) RuntimeEnvironment
.getProtocolLinker());
// Filter filter = new Filter(filterExpression, new Linker());

decoder.addListener(filter);
Packet packet = null;

int i = 0;
while ((packet = decoder.nextPacket()) != null) {
String sport = packet.getHeader("TCP").getField("src").toString();
System.out.println(sport);
String dport = packet.getHeader("TCP").getField("dst").toString();
System.out.println(dport);
String saddr = packet.SADDR;
System.out.println(saddr);
String daddr = packet.DADDR;
System.out.println(daddr);
}
}

}


Thx!

Birch