Connection reset when not using tcpmonitor

I'm facing a very strange problem when consuming a webservice.

When I consume the webservice using tcpmonitor it works fine. But when I 
use the real url I have the following problem:

Exception in thread "main" AxisFault
  faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
  faultSubcode:
  faultString: java.net.SocketException: Connection reset
  faultActor:
  faultNode:
  faultDetail:
{http://xml.apache.org/axis/}stackTrace:java.net.SocketException: 
Connection reset
     at java.net.SocketInputStream.read(SocketInputStream.java:189)
     at java.net.SocketInputStream.read(SocketInputStream.java:121)
     at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
     at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
     at 
org.apache.axis.transport.http.HTTPSender.readHeadersFromSocket(HTTPSender.java:583)
     at 
org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:143)
     at 
org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
     at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
     at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
     at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165)
     at org.apache.axis.client.Call.invokeEngine(Call.java:2784)
     at org.apache.axis.client.Call.invoke(Call.java:2767)
     at org.apache.axis.client.Call.invoke(Call.java:2443)
     at org.apache.axis.client.Call.invoke(Call.java:2366)
     at org.apache.axis.client.Call.invoke(Call.java:1812)
     at 
net.tandberg._2004._02.tms.external.booking.BookingServiceSoapStub.saveConference(BookingServiceSoapStub.java:681)
     at test.client.TesteBooking.main(TesteBooking.java:51)

Does somebody know what is happening?

Thanks in advance

-- 
*Humberto Costa de Santana*
Grupo de Desenvolvimento de Sistemas - AI - Reitoria