Share JSESSIONID between multiple services

[nias]

i'm trying to share a session between more then one webservice endpoint for statefull webservices (via seam to use conversations).

i've tried to get each port via:

URL wsdlLocation = new URL("...");
QName serviceName = new QName(..., ...);
Service service = Service.create(wsdlLocation, serviceName);
port1 res = (port1)service.getPort(port1.class);
BindingProvider bp = (BindingProvider)res;
bp.getRequestContext().put(BindingProvider.USERNAME_PROPERTY, "admin");
bp.getRequestContext().put(BindingProvider.PASSWORD_PROPERTY, "admin");
bp.getRequestContext().put(StubExt.PROPERTY_AUTH_TYPE, StubExt.PROPERTY_AUTH_TYPE_WSSE);
URL securityURL = new File("src/test/webservices/META-INF/jboss-wsse-client.xml").toURL();
((StubExt)bp).setSecurityConfig(securityURL.toExternalForm());
((StubExt)bp).setConfigName("Standard WSSecurity Client");
bp.getRequestContext().put(BindingProvider.SESSION_MAINTAIN_PROPERTY, true);

all calls from one port are working fine inside the session but now i wan't to take the JSESSIONID from port1 after first call and use them for port2 with the following code:

final Map responseMap = ((BindingProvider)port1).getResponseContext();
final Map headerValues = (Map)responseMap.get(MessageContext.HTTP_RESPONSE_HEADERS);
final List<String> cookieHeaders = (List<String>) headerValues.get("Set-Cookie");
for(String x : cookieHeaders) {
if(xl[0].equals("JSESSIONID")) {
 Map<String, List<String>> headers = (Map<String, List<String>>) ((BindingProvider)port2).getRequestContext().get(MessageContext.HTTP_REQUEST_HEADERS);
 if (headers == null) {
 headers = new HashMap<String, List<String>>();
((BindingProvider)port2).getRequestContext().put(MessageContext.HTTP_REQUEST_HEADERS, headers);
 } else { System.out.println("headers exists"); }

 List<String> cookie = headers.get("Cookie");
 if (cookie == null) {
 cookie = new ArrayList<String>();
 headers.put("Cookie", cookie);
 } else { System.out.println("cookies exists"); }
 cookie.add("JSESSIONID="+xl[1]);

The cookie would be extracted but ignored on first call for port2, therefore a new session starts on port2.
how can i solve this?